Bluetooth car adapter for aux input: The Best Bluetooth Kits for Every Car Stereo

USB Powered Bluetooth Adapter for AUX Inputs & Mini Smart Dual Port USB Car Charger Adapter 5V/2.1A And 5V/1A

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– MISBDL190124


$19. 99

  • Description

  • Warranty Information

  • Additional Information

Included in this kit


This bundle includes a USB Powered Bluetooth Adapter for AUX Inputs & a Mini Smart Dual Port USB Car Charger Adapter 5V/2.1A And 5V/1A

USB Powered Bluetooth Adapter for AUX Inputs
This device plugs into any usb port for power, you can then connect your phone to it via Bluetooth, and use the 3.5mm headphone jack output to connect to the aux-input of any car stereo, home receiver, or any non Bluetooth sound system with a 3.5mm input. Enjoy your music streamed from your phone directly to your speakers of choice, without needing to upgrade to a different Bluetooth enable receiver in your car, truck, boat, or home.

Mini Smart Dual Port USB Car Charger Adapter 5V/2.1A And 5V/1A
High quality bicolor Alloy Shell, 2.1A Output Quick Charge
• Overtemperature, overcurrent, overload, short circuit, & reverse input protection.
• Overcharge – automatically powers off to provide protection for your device.
• 2-PORT USB – Charge two devices at once. One 1.0 Amp port and one high-current 2.1 Amp port.
• Corrosion-resistant durable plug.
• Small – Only 7 cm height, portable and convenient to carry.








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Click image to download warranty PDF

Manufacturer SKU:






Feature 1:

Receives the signal from any BT enabled device and sends to any receiver with low level inputs or a head unit with an AUX input.

Feature 2:

Control-less – Uses the controls on the BT device for Play/Pause, Track & Volume adjustment.

Feature 3:

Dual USB Ports – Charge two devices at once.

Feature 4:

High-current 2.1 Amp port for fast charging new devices.

Feature 5:

Low current 1.0 Amp port for older devices or devices drawing less current.




0. 5000 lbs



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USB Powered Bluetooth Adapter for AUX Inputs



This device plugs into any usb port for power, you can then connect your phone to it via Bluetooth, and use the 3. 5mm headphone jack output to connect to the aux-input of any car stereo, home…

Best Universal Car Bluetooth Adapters in 2023

$24.90 at

$22.99 at

$11.99 at

$46.99 at

$42.99 at


$129.95 at

$27.99 at

$29.95 at

In this article: We’ll review 11 of our best pick FM Transmitter, Aux-in, Visor Style and OEM integrated Bluetooth adapters and kits to bring streaming music, handsfree calls and more to your car. We’ll provide quick reviews, opinion, photos and price comparisons to help you save money on the perfect Bluetooth device for you.

Bluetooth technology revolutionized the automobile environment by creating an easy to use system of wirelessly connecting devices to your car stereo. Bluetooth has become so popular that most new cars today have built-in Bluetooth available. Adding Bluetooth to a vehicle that doesn’t have it already built-in, is fairly easy and you will have several options available regardless of what you drive.

Sometimes, it’s easier and better to simply replace your factory head unit with one that has built-in Bluetooth. You can buy single-DIN and double-DIN car stereos to install in your vehicle that will give you wireless communication. This is a good option if your factory stereo doesn’t work, is poor quality, or has terrible audio performance.

For many other drivers, swapping out the head unit is an expense that simply isn’t worth doing. In many cases, factory head units are odd shapes and sizes or include controls for heating and air conditioning or other features that an aftermarket stereo won’t easily replicate. For these folks, there are several different types of Bluetooth transmitters you can use to add wireless connectivity for hands-free calling and wireless music streaming.

In this list, you will find some of the best Bluetooth transmitters on the market today. We grouped them according to their primary use or function.  A Bluetooth transmitter can increase your options for listening to music when driving and can provide a true hands-free environment for making and receiving phone calls while you are driving.

Here Are Our Best Universal Bluetooth Adapters for Your Car

  • Bluetooth FM Transmitters
    1. Best Overall FM Transmitter Pick: Anker ROAV F2
    2. Runner Up, Best FM Transmitter Bluetooth Adapter: Nulaxy KM18
    3. Best Charging FM Transmitter Bluetooth Adapter: ZEEPORTE FM50
  • Aux-In Bluetooth Adapters
    1. Best All Around Aux-In Bluetooth Adapter for Your Car: Kinivo BTC450
    2. Best Plug-In Aux Bluetooth Car Adapter: Mpow Bh398A
    3. Best FM Transmitter & Aux-In Combo: Elwin T3
  • Visor Style Bluetooth Devices
    1. Best Overall Visor Car Bluetooth Device: Jabra Freeway
    2. Best Sounding Hands Free Visor Car Bluetooth Device: Besign BK06
    3. Runner Up, Best Visor Bluetooth Device: Motorola Sonic Rider
  • Bluetooth Kits for Factory Radios
    1. Best Overall Factory Radio Bluetooth Adapter: Crux BT-Series Adapters
    2. Runner Up, Best Bluetooth Adapter for Factory Radio: USA Spec BT-45 Adapters

Recent Reviews & Articles

Bluetooth FM Transmitters

This type of Bluetooth transmitter simply plugs into your 12 volt accessory socket to provide you with Bluetooth functionality in any car. These devices work by sending a radio signal to the FM band of your car stereo. Once you pair the transmitter to your phone or other device, you simply set the transmitter and your car stereo to an unused FM band. It doesn’t get much easier than this! These devices offer a compact and simple solution to almost any vehicle.

1. Best Overall FM Transmitter Pick

Anker ROAV F2

Latest Prices

$24.90 at

Key Features

  • Plugs into 12V acc socket
  • Simultaneous charging for two devices via USB
  • Transmits FM signal to the car stereo
  • Includes ROAV app
  • Car Finder feature marks your vehicle location when signal is lost
Anker ROAV F2 Quick Review

The Anker ROAV has been one of the more popular FM transmitter types on the market for many years. The F2 is the newest model and features a stable Bluetooth connection using the 4.2 protocol. The device plugs into a 12V socket and provides dual USB ports to charge your devices while you drive.

The ROAV has some neat features you won’t find on other products, including the ability to location mark your vehicle when you park. This will make it easy to find your car if you happen to forget where you parked. The ROAV app makes setup easy and gives you the ability to connect the Anker device with other compatible ROAV accessories.

This device allows wireless streaming of music from iPhone and Android systems. It includes a built-in microphone for making hands-free phone calls while driving.

  • Easy to use, install, and set up
  • Low profile appearance disappears inmost car interiors
  • Microphone is less than ideal
  • Some users report connection issues when starting and stopping the vehicle

2. Runner Up, Best FM Transmitter Bluetooth Adapter

Nulaxy KM18

Latest Prices

$22.99 at

Key Features

  • 1.44” LCD screen provides up-to-the-minute information
  • Large phone button provides safe connection for hands-free communication
  • Compatible with Siri and Google Assistant
  • Single USB charging port
  • Sends signal to FM station on car stereo
  • Aux-in feature as well
Nulaxy KM18 Quick Review

The Nulaxy FM transmitter provides you with an excellent and highly functional solution to getting Bluetooth streaming in your older vehicle. The device plugs into a 12 volt accessory socket and provides you with a 1.4” LCD screen for easy monitoring. A large button on the device enables fast hands-free phone connection as well.

This is an excellent option for adding Bluetooth, particularly for vehicles that have a 12V socket on the center console. The unit rides on a gooseneck that allows you to twist and flex the screen for optimal viewing. A single USB port lets you charge a device while you drive.

While there are many affordable options out there, this one gives you a few rare features. Noise cancellation technology enhances call clarity and helps to limit road noise. HiFi sound quality ensures that you will hear music and phone calls at the highest possible quality. This newly upgraded design also uses the Bluetooth 5.0 protocol for the most reliable streaming experience possible.

  • Looks cool and futuristic
  • Easy to find phone connection button is a huge plus
  • Bluetooth 5. 0, Assistant-ready, and HiFi sound quality are big pluses
  • Not ideal for some vehicles due to shape of unit and location of 12 V accessory socket
  • Sometimes switches to Chinese language preference on its own

3. Best Charging FM Transmitter Bluetooth Adapter


Latest Prices

$11.99 at

Key Features

  • 12V accessory plug
  • Bluetooth 5.0
  • 3 USB ports including a USB-C Quick Charge port
  • Provides hands-free calling
  • Supports voice navigation
ZEEPORTE FM50 Quick Review

This is one of the most functional compact designs around and offers quite a few interesting features that are uncommon on FM transmitter Bluetooth devices. So functional, we even installed one in our own vehicle and reviewed it! The ZEEPORTE device features three USB charging ports, including one that uses the latest USB-C format for ultra-fast charging and reliable connection.

A dedicated phone connection button provides lightning-quick connection to phone calls for true hands-free driving. It uses the latest Bluetooth 5.0 protocol for reliable connections. It even features five built-in EQ modes to tailor your payback to the style of music you listen to.

ZEEPORTE added a little flair to this device, too. It features a five-way user changeable lighting ring that has several modes to add a little color to your drive. Light-up USB ports make connections in the dark easy and safe.

  • USB-C port is vital for users of newer devices
  • Light-up ring is stylish & provides extra light for easy plug-in
  • Some users report defects causing ACC fuses to blow
  • Somewhat large size may not fit in all vehicles

Aux-In Bluetooth Adapters

Though losing traction these days, many older vehicles use a 3.5mm headphone jack to allow connecting of phones and devices for various purposes. While you can typically connect your phone directly using a cable, it isn’t the most elegant solution. If you want to use the Aux-In port without the spider web of charging cables, these FM transmitters will get the job done for you in a pinch. If your vehicle doesn’t have an Aux-in port, you can always add one, though it is a bit of work. An advantage of using the Aux-in over an FM transmitter is the improved audio quality and there is less noticeable lag, particularly when making or receiving phone calls.

1. Best All Around Aux-In Bluetooth Adapter for Your Car

Kinivo BTC450

Latest Prices

$46.99 at

Key Features

  • Plugs into Aux-in and 12V acc plugs
  • Easy to connect your device
  • Low-profile design blends in with almost any interior
  • Provides CD-quality audio and hands-free calling
Kinivo BTC450 Quick Review

Here is an elegant solution to gaining Bluetooth connections in your car. The Kinivo transmitter plugs into the Aux-In port on your stereo and provides over-the-air music and hands-free calling without the obtrusiveness of many designs.

Installation is a snap. Simply use the included adhesive pad to attach the disc-shaped device to a convenient place on your dash. One cable will connect to the Aux-in port, while the other routes to the 12V accessory plug. To answer a phone call, all you do is press the center of the disc. It really couldn’t be more simple!

The accessory plug that powers the device also allows you to charge your device using a dedicated USB port. Out-of-the-box, this is an easy-to-use product. With a little time and patience, you can adjust settings in your device to even enable advanced features like access to Google Now to use as an assistant.

  • Doesn’t clutter up the interior of your car with weird looking devices
  • Easy to use, simple to pair, and reliable
  • Doesn’t light up, so it can be difficult to use easily in the dark
  • Won’t provide hands-free calling or answering unless you are streaming music


Best Plug-In Aux Bluetooth Car Adapter

Mpow Bh398A

Latest Prices

$42.99 at

Key Features

  • No cables- Plugs directly to a 3.5mm jack on your stereo
  • Wirelessly streams music and phone calls
  • Bluetooth 5.0 protocol
  • 10-12 hour battery
  • Also works for TVs, gaming systems, and headphones
MPow Bh398 Quick Review

When you are looking for a simple solution to adding Bluetooth to your older car or truck, the MPow FM transmitter is an ideal opportunity you shouldn’t pass up. This is a sleek and simple way to add connectivity. No cables, no nonsense, just plug-and-play in the most convenient form possible.

This FM transmitter is fairly simple. It plugs straight into your 3.5 mm jack and connects wirelessly to your phone, tablet, or other Bluetooth-capable device. You get the fastest, easiest connections because of the Bluetooth 5.0 protocol and it works with pretty much any car, truck, or van on the market.

The MPow Bh398 has its own rechargeable battery, so you don’t have to deal with wires running from the unit to your 12V plug like other options. Plus, the blade-like design is convenient and easy to use. Make wireless calls, stream music, combine the two- this is a great solution when you have an Aux-In available.

  • Lightweight and easy to install
  • Simple to use, provides a great connection
  • Long-term battery issues
  • Can’t charge battery and play music simultaneously

3. Best FM Transmitter & Aux-In Combo

Elwin T3

Latest Prices


Key Features

  • Transmitter and receiver in one package
  • Plugs into 3.5mm Aux-In on any device
  • Allows for Bluetooth headphones at home and wireless streaming in the car
  • Rechargeable battery reduces random cords
Elwin T3 Quick Review

Sometimes you want to transmit a signal, other times you want the device to receive the signal. Most of the products here do only one thing-transmit. This little device manages to do both. This allows you to not only use it in your car to Bluetooth music to your stereo, but also take it inside and stream the content to your TV, stereo, or use it for wireless headphones while gaming.

The transmitter provides an easy, one-touch hands-free calling button so you don’t have to take your eyes off the road when driving. It uses a 3.5mm audio jack and has a built-in rechargeable battery and can connect two devices at once. The device can still be used when it is charging.

The ability to use this device to create a Bluetooth environment with virtually any equipment makes it a great option. It is a simple and effective solution for drivers of older vehicles, those who have home entertainment devices that don’t have Bluetooth and is perfect for gaming systems and wireless headphones.

  • The ability to switch from receiving to transmitting is very useful
  • Easy to pair with almost any device
  • Large answer/ reject button for convenient hands-free phone calls
  • Instructions for clearing and establishing connections are not very clear
  • Not compatible with all TV sets or soundbars

Visor Style Bluetooth Devices

Many drivers are totally happy with their car stereo, but lament that it lacks hands-free calling. Visor-style Bluetooth devices are not meant to stream music. Instead, these devices provide you with better hands-free calling than most stereos or other devices that focus on streaming music.

1. Best Overall Visor Car Bluetooth Device

Jabra Freeway

Latest Prices

$129.95 at

Key Features

  • Visor-mount hands-free calling device
  • Three on-board speakers and dual microphones for crystal clear calls
  • Voice control provides hands-free operation
  • Virtual surround sound technology and noise reduction
  • FM transmitter for audio playback
Jabra Freeway Quick Review

The Jabra Freeway is arguably the best hands-free solutions on the market. It’s also significantly more expensive than any other option on this list. What you get for that extra expense is a crystal-clear calling environment that is both easy to use and highly reliable.

Jabra gives you three high-fidelity speakers built into the low-profile design and dual microphones. Phone calls are crystal clear, even in trucks with knobby tires and loud exhaust. Similarly, people you talk with can hear you very well without a lot of distortion. With the device mounted on the visor of your car, answering or declining calls is simply a matter of tapping a button. You won’t ever have to look away from the road again.

The Jabra freeway can transmit music to your stereo using an FM transmitter, or it can play music directly through its onboard speakers. It won’t blow your doors off, but it is a great way to play music in your office. The Jabra Freeway can connect two devices simultaneously and has a built-in rechargeable battery.

  • Excellent call quality
  • Simple to use interface makes pairing with devices simple
  • Long battery life with short recharge time
  • Pricey option for adding hands-free calling
  • FM transmitter isn’t as good as some other options

Besign BK06

Latest Prices

$27. 99 at

Key Features

  • Dual speakers and single microphone
  • Provides easy hands-free connection for making and receiving phone calls
  • Auto On/Off
  • Built-in rechargeable battery
  • Bluetooth 5.0 protocol
  • Compatible with voice assistant for Android and iPhone
Besign BK06 Quick Review

The Besign visor hands-free device is a great, low-cost option that outperforms many higher priced units. Dual speakers provide good call quality even in loud vehicles. The unit is also quite small, so it camouflages nicely into your visor. The Besign BK06 is compatible with popular AI Assistant technology and can provide voice navigation commands.

The auto on/off feature is one of the neat and convenient functions many devices in this price range fail to include. It lets you leave the device powered on when you come and go, turning on and off automatically when the car door closes. This simple convenience doesn’t seem like a big deal until you use a hands-free device that requires manually connecting each and every time you get in the car.

The Besign does not provide FM transmission, so don’t count on this device if you want to stream music. It allows you to connect up to two devices simultaneously and has a built-in battery with an advertised operation of 20 hours.

  • Easy to use device for adding hands-free tech to any vehicle
  • Dual speakers are plenty loud enough for phone calls in noisy vehicles, even work trucks
  • Convenient On/Off feature eliminates connection frustration
  • Microphone isn’t the best
  • Some users had difficulty configuring phones for voice recognition, auto On/Off, and navigation

3. Runner Up, Best Visor Bluetooth Device

Motorola Sonic Rider

Latest Prices

$29.95 at

Key Features

  • Low-profile design
  • Hands-free calling with the press of a button
  • Easy pairing with any device
  • Long battery life with fast recharge time
  • Connects two phones at once
Motorola Sonic Rider Quick Review

Motorola provides a simple, compact, and easy-to-use solution to getting hands-free calling in your older car. The visor-mount device features a single speaker and microphone for clear calls and voice commands. It has a low-profile design that blends in easily for most vehicles.

Call quality is very good, as expected from a reputable brand like Motorola. It connects easily to your phone and enables you to make and receive phone calls safely and without breaking any laws. While it can play music from your device, it really is intended to provide phone interface, not audio playback quality.

Large buttons make it easy to adjust volume, connect devices, and any other task you might want to do while driving. The built-in rechargeable battery provides 40+ hours of operation between charges. It can even connect two phones simultaneously while you drive.

  • Small size is ideal for many vehicles where an obtrusive device is inconvenient
  • Simple pairing with any device
  • Inexpensive option for adding hands-free calling
  • Single microphone picks up road noise in louder vehicles
  • Single speaker doesn’t provide clear sound at high speeds

Bluetooth Kits for Factory Radios

It’s pretty common to find used vehicles on the market that do not include hands-free calling despite the technology having been available when new. If your car or truck has non-functional buttons for hands-free calling, you can add these devices to enable use. These are vehicle-specific solutions, so they won’t work for everyone.

1. Best Overall Factory Radio Bluetooth Adapter

Crux BT-Series Adapters

Key Features

  • Installs to a factory stereo for compatible vehicles
  • Provides hands-free calling and wireless streaming to vehicles that do not have factory controllers, but had the feature as an option when new.
  • Provides a seamless installation without cables, cords, and battery issues

Find an Adapter Your Car

Crux BT- Series Adapter Quick Review

Crux provides one of the most reliable Bluetooth devices for vehicles that are equipped with hands-free buttons, but lacking a controller. Installation of these devices is more complex than other solutions, but once you have it hooked up, your vehicle looks factory without weird things sticking out of the dash or hanging from the visor.

Crux provides controllers for a wide range of vehicles. The device simply plugs into the unused ports on the stereo and involves making connections to the steering wheel controls. This is a seamless way to add Bluetooth streaming to your factory radio. You’ll even get an Aux-In port which can be very useful for providing even more streaming options.

  • Works perfectly with compatible vehicles
  • Excellent way to gain factory tech without expensive modifications to the vehicle
  • Provides access to controls that are otherwise useless
  • Requires significant installation
  • Won’t compensate for terrible factory speakers

2. Runner Up, Best Bluetooth Adapter for Factory Radio

USA Spec BT-45 Adapters

Key Features

  • Gain hands-free calling and music streaming in vehicles without a factory controller
  • Seamless operation with correct installation
  • Adds USB and Aux-In ports for vehicles that don’t include them

Find an Adapter Your Car

USA Spec BT-45 Adapter Quick Review

USA Spec provides a Bluetooth solution for vehicles that lack factory-installed connectivity. These hands-free devices are vehicle-specific, so they won’t work for everyone, but many of the most popular cars and trucks around have options available. You get an Aux-In and USB port, too.

These devices are great for upgrading your factory car stereo that doesn’t have a controller. It lets you stream wirelessly, make and receive phone calls, and is compatible with iPhone and Android voice assistants. Installation is a bit more complex than stand-alone devices, but you won’t have wires hanging around the dash.

  • Ideal solution for vehicles without optional Bluetooth
  • Factory-looking installation
  • Works flawlessly with Android and iPhone voice assistants
  • Somewhat expensive in comparison with replacing the head unit
  • Requires significant installation to use factory controls

Looking for accessories to add to your car? Check out these lists!


Adding Bluetooth to any vehicle is simpler today than ever before, and the newest protocol gives users reliable, simple, and effective options for hands-free calling and music streaming. Any of the devices on this list will suit your needs, it’s really how you want to gain the options that matter most. No matter which device you choose, the rewards far outweigh the potential costs. You’ll be happy to avoid getting a ticket that fines far more than any of these devices cost, you’ll avoid getting into accidents, and the device will make it fast and simple for you and your passengers to enjoy the audio content, navigation, and hands-free convenience your vehicle currently lacks.

Kameron Scott

In 2010, Kameron founded CarAudioNow as an outlet to write about his opinions on automotive and marine stereo products. Using his first hand experience in the field while owning and operating SC Autosound in Orange County, California, he began assembling lists of products, how to’s and more. He tested products in his garage and reviewed them them as he installed them in customer vehicles. The goal was to give people easy access to quality information about car audio and electronics and tech so that you don’t have to spend hours researching something like a car speaker.

Between 2015 and 2018 he worked as a Digital Product Manger at Motor Trend, working directly with the key editorial members like Mike Floyd and Ed Loh to build meaningful web experiences tailored to the automotive enthusiast.

Today he’s still assembling lists, testing products and writes articles along with the few members of CarAudioNow’s experts that he trusts. Apart from being the founder of CarAudioNow, he’s the primary editor and contributor as well.

Related posts

How to turn on music in the car without an additional input

In the era of Apple CarPay and Android Auto, wireless connection of cars to smartphones and seamless audio streaming, it’s easy to forget how things used to be. Not so long ago, you needed to pair via Bluetooth, find the right USB port, or even send audio through the car’s auxiliary 3.5mm input.

But what if even a modest secondary port doesn’t fit? Many older cars don’t have this connection, and without Bluetooth and USB, they don’t offer a factory way to connect to a smartphone. Luckily, you have a cassette or FM radio adapter handy.

1. Cassette adapter

(Image credit: Arsvita)

First, a serious old school approach. These adapters can be bought for less than £10 and plugged into your car’s tape recorder, as well as plugged into your smartphone’s headphone jack. Naturally, you will need a smartphone with a headphone jack or a USB adapter that will be placed between the phone and the cable that goes to the cassette adapter.

A slightly more technical approach is the Bluetooth cassette adapter. They can be bought for around £15 and connected to a phone via Bluetooth and then inserted into a cassette deck. This model from Arsvita includes a simple button for playing and pausing music, and for answering and ending calls, just like the button on your headphone cable.

In both cases, the sound is sent from your phone to the cassette, then to the car stereo, and out the speakers, as if you were listening to a cassette, as if it were the eighties again. In the case of the Arsvita Bluetooth 5.0 adapter, the built-in battery provides eight hours of music or calls and 168 hours of standby time. The battery charges via microUSB in 1.5 hours.

2. FM radio adapter

(Image credit: ZeaLife)

Next we have the FM radio adapter. They plug into your car’s 12V cigarette lighter socket and connect to your smartphone using Bluetooth. Audio (calls, podcasts, music, etc.) is sent from the phone to the adapter via Bluetooth and then broadcast using the FM radio signal. You then turn on your car radio to that frequency and your phone’s sound comes through your car stereo.

This might seem like a bit of a hack, but it often works surprisingly well, and as long as your car’s speakers are half decent, music and calls from your connected smartphone sound good.

Some of these adapters can be purchased for £10 to £15, while more expensive versions cost £20 to £25. Some options are more compact than others, and some have one or two spare USB ports for charging other devices from the same cigarette lighter outlet, as well as buttons and dials for playing or pausing music, taking calls, and adjusting the volume. They all have a simple display to show the FM frequency in use, so you can tune your car radio accordingly.

(Image credit: Pure)

If you’re on a budget and want to access DAB digital radio in a car that doesn’t have connectivity or an auxiliary jack, the Pure Highway range can help. Priced at around £55, the Pure Highway 400 plugs into a 12V cigarette lighter socket, then connects to your phone via Bluetooth and broadcasts an FM frequency to connect to your car radio.

But it also has DAB radio so you can tune into digital radio stations directly instead of having to stream them from an app like BBC Sounds on your phone. Mounted on the dashboard and powered by a couple of AAA batteries, it looks almost like a factory device with a simple display and buttons for music and volume control.

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Manual for Trioma BMT-2.2 bluetooth module – Trioma

Download manual in PDF

  • ENG

  • ENG

Products by connector type

  • BMT-2. 2

Section 1. Description

The BMT-2.2 module is an accessory for Trioma’s USB adapter. It is compatible with Skif and Skif-Volvo adapters, as well as with all Flipper-2 models, except for the special Multi-Flip version (for BMW-DSP).

It allows you to wirelessly connect your multimedia device to your car’s audio system via an installed USB adapter.

The module can work in the Bluetooth 4.0 standard or lower, supports A2DP (stereo sound reception) and HFP (wireless telephone headset) profiles.

Section 2. Connection and pairing

  1. install the USB adapter (Flipper-2, Skif, Skif-Volvo, see the corresponding instructions).
  2. connect the module (DIN-8 male connector) and the USB adapter (DIN-8 female connector).
  3. connect a microphone and install it in the car (optimally – in front of the user within a radius of no more than 0.8 m). It is not recommended to install the microphone near the elements of acoustic systems, as well as point them at them.
  4. , if necessary, connect an adapter for AUX to the module (not included).
  5. activate the USB adapter by selecting the external standard CD changer mode on the radio (hereinafter referred to as CDC).
  6. switch the USB adapter to auxiliary interface/AUX mode (see adapter instructions).
  • Flipper-2 – by turning on / off the Repeat (Random / Scan) function or removing the USB flash drive from the USB connector. “On / off” means that the function must be turned on and turned off within 3 seconds.
  • Skif – by turning on / off any of the Repeat / Random / Scan functions during playback from a USB flash drive. “On / off” means that the function must be turned on and turned off within 3 seconds.
  • Skif-Volvo (except RR Vogue) – with the Eject button during playback from a flash drive.
  • Skif-Volvo (in RR Vogue) – by selecting CD4 during playback from a flash drive.

Turning on the AUX mode should result in the activity of the bluetooth module, while the module generates a characteristic melodic signal, and the radio display should show the status:

  • for the Flipper-2 adapter: Track-51 (BMT basic mode) or Track-52 (selective BMT mode)
  • for Skif and Skif-Volvo adapter: Track-13
  1. Start the search mode for new Bluetooth devices on the phone and select “Trioma BMT-2. 2″ in the list of found devices. If pairing is established, two tones will sound in the car’s acoustics. Note: Only one Bluetooth device can be connected at a time.

After successfully pairing the BMT-2.2 bluetooth module with a mobile device, all further connections and disconnections between them will occur automatically.

The BMT-2.2 module has a built-in acoustic echo suppression system. For more efficient operation, it is not recommended to point the microphone at the elements of the speaker system when installing the microphone, and also to set an excessively high sound level of the telephone channel when setting up the bluetooth module.

Troubleshooting. Restarting the module

In case of problems (unsuccessful pairing, incorrect operation, etc.):

  • Check your device’s Bluetooth settings,
  • repeat the pairing process (steps 6-7).
  • To restart the BMT-2.2 module, you must:

    • on all vehicles with Skif, Skif-Volvo or Flipper-2 adapter (except for Toyota/Lexus with adapter software v. 41 or higher) set the factory system to Radio mode or turn off, then turn on CDC mode, and put the adapter into AUX mode.
    • on Toyota/Lexus vehicles (when using a HoST-Flip USB adapter with software v.41 or higher), the Bluetooth module is active in all modes when the vehicle ignition is on. To restart the module, you need to remove the flash drive from the USB connector for 2-3 seconds. When using earlier software versions in Toyota/Lexus, the module is restarted in the same way as on all other vehicles (by switching to the “Radio” mode and back).

    Section 3 Operation

    Bluetooth module BMT-2.2 can be in one of three states: “off”, “on”, “standby”.

    In vehicles with an optical MOST interface (Skif and Skif-Volvo USB adapters), the module is enabled only when the USB adapter is active and in AUX mode. In all other cases, the module is disabled.

    In Toyota/Lexus vehicles (HoST-Flip USB adapter with adapter software version v.41 or higher), the module is enabled when the USB adapter is active and in AUX mode. The module is switched off for a short time when the USB flash drive is removed from the USB connector of the adapter. In all other cases, the module is in the standby state.

    In other vehicles (USB adapter Flipper-2, including Toyota/Lexus with adapter software version v.40 or less), the module is enabled when the USB adapter is active and in AUX mode. The module is in the standby state when the USB adapter is active and is in flash drive playback mode. In all other cases, the module is disabled.

    Full control of the module is possible if it is in the “on” state. At the same time:

    • Playback is started/stopped using the disc selection buttons.
    • Selecting files for playback – using the track selection buttons.
    • Receiving and rejecting a phone call – using the buttons for selecting discs or tracks (depending on the software version).
    • The fast playback commands adjust the sound level of the wireless channel.

    In the standby state, the module responds to incoming and outgoing telephone calls, and upon recognition of such, it switches to the active mode of an external device, while the sound streams of the wireless channel are connected to the microphone and acoustics. At the same time, the state of “Track-50” is displayed on the display of the head unit, it is allowed to accept and reject a telephone call with the buttons for selecting disks or tracks. After the session, the system returns to its original state.

    Volume control

    Fast play commands adjust the volume of the wireless channel up or down. During sound reproduction, the volume level of the audio channel is adjusted, and in the absence of sound reproduction, the volume level of the telephone channel is adjusted. The module remembers these adjustments in non-volatile memory when switching to the “Off” state. Therefore, in order to memorize the adjustments, it is necessary to at least briefly switch the module to the “Off” state by switching the system to the “Radio” mode or removing the flash drive (depending on the type of system).

    Section 4. Audio input (AUX)

    The BMT-2.2 Bluetooth module allows you to connect an additional external audio source to the system. For this purpose, the module case has an additional MiniJack-3.5 female connector (“mother”), which serves as an audio input. It is active if the USB adapter is in the AUX state, and the wireless audio transmission channel is not active (it is not necessary to break the connection between the module and the mobile device to play sound through the external input).

    Section 5. Use in various vehicles

    In all vehicles (when the BMT-2.2 module is in operation), the sound is reproduced by the standard acoustic system, regulated by the standard controls, and during a telephone conversation, the sound is received by the microphone supplied with the module. The user can set separately the sound level for the telephone conversation mode and for the sound playback mode. Using the buttons of the standard audio system, you can start and stop sound reproduction, switch forward and backward audio tracks, and also “pick up / hang up” during a telephone conversation.

    1. In Toyota/Lexus vehicles (USB adapter HoST-Flip with software version v. 41 or higher) wireless telephone communication is possible in all operating modes of the standard system, even if the head unit is turned off. During a telephone call (incoming or outgoing), the BMT-2.2 module is activated, the regular buttons for selecting a disk or track allow you to “pick up / put down the phone”. Upon completion of the call, the standard system returns to its original state. Wireless audio is implemented differently depending on the software version:
      – basic BMT mode (software v.41) – all sounds sent to the wireless channel are reproduced by standard acoustics, regardless of the head unit mode.

      – selective BMT mode (software v.42) – all sounds of a mobile device that are not related to a telephone session are played only when the USB adapter is active and in AUX mode. That is, if the adapter is in a different mode, then this version of the software allows you to exclude “unnecessary” interruption of the playback of the main source (for example, FM broadcast with incoming SMS). But at the same time, the possibility of “hands-free communication” remains.

    2. In other vehicles (except Toyota/Lexus) (when using a module with a Flipper-2 adapter), wireless telephone communication is possible only when the USB adapter is active (that is, the standard system is in CDC mode, the adapter plays a flash drive or is in the AUX state). When making a phone call (incoming or outgoing), the adapter will interrupt playback from the flash drive and switch to the external device activity mode. At the same time, the regular buttons for selecting a disk or track will allow you to “pick up / put down the phone”. Upon completion of the call, the standard system returns to its original state. Wireless audio is implemented differently depending on the software version:
      – basic BMT mode: all sounds from the wireless channel are played by standard acoustics (both when the adapter is in AUX and when the flash drive is playing), causing playback to pause.

      – selective BMT mode: all sounds that are not related to a telephone session are played by standard acoustics only when the adapter is in AUX mode. In this case, only a phone call can interrupt playback from a flash drive.

    3. In vehicles with an optical MOST bus (when using the module in conjunction with a Skif / Skif-Volvo USB adapter), telephone communication and music playback via a wireless channel are only possible when the USB adapter is active and in AUX mode (head unit in CDC state) .

    Section 6. Delivery set

    • Bluetooth module BMT-2.2
    • Test microphone (3-pin stereo)
    • Instruction

    Section 7. Module connectors. Images

    • DIN-8 male (male) – for connection to USB adapter
    • MiniJack-3.5 female (“female”) – for connecting a hands-free microphone (included)
    • MiniJack-3.5 female (“mother”) – line input AUX

    Section 8. Frequently Asked Questions

    1) How to activate the Bluetooth module connected to the Skif USB adapter? While playing a flash drive, turn on and immediately turn off any of the Repeat (repeat), Random (random playback), Scan (scan) functions
    2) How to activate the bluetooth module connected to the Skif-Volvo USB adapter? While playing a flash drive, press the Eject button (disc ejection), for RR Vogue – CD4
    3) Incorrect (unstable) operation of the module – check the USB adapter (the flash drive “sings”, switching tracks and folders works)
    – reboot the phone
    – check the correct operation with another phone
    4) What should I do if the volume level on the bluetooth channel has decreased? – compare the volume of the radio, flash drive and bluetooth channel.