Expert Service 1-877-289-7664 [Hours]


Audio In-Car Bluetooth Extension for GROM-USB, GROM-BT3 and GROM-MST3 (Wireless-BTD)

Out of Stock - Backorder

Thanks , You Pay:


with warranty

+ FREE Shipping in US 48

Add an Extended Warranty

SquareTrade Product Warranty
Fast, Free Shipping

Within the US 48

60-Day Money-Back

Hassle Free Returns

Low Price Guarantee

Seen it for less? Click here

365-Day Coverage

Warranty assistance for a year

Will this fit my ride?

Check Vehicle

Item Added to Cart


Audio In-Car Bluetooth Extension for GROM-USB, GROM-BT3 and GROM-MST3 (Wireless-BTD)


Keep Shopping

Get Added Peace of Mind with SquareTrade

Why SquareTrade?

  • The #1-Rated Protection Plan
  • 5-Day Service Guarantee & Free Shipping
  • Protection from Normal, Everyday Use
You have added a warranty
Add Warranty
3 years of protection

GROM Audio 35MDN

5 Ft. GROM Mini Din to 3.5mm Cable With High Quality Sound



Don't see the accessory you're looking for?
View all available accessories for the GROM Audio BTD.

Get FAST answers from customers ASK a Question See questions answers

GROM Hands Free Bluetooth Integration

This Bluetooth Hands Free Car Kit integrates Bluetooth into original car stereos for Volvo. It is the easy and affordable way to equip your car with Bluetooth connection for Hands Free Calling and Wireless Audio. >The BTD adapter from GROM AUDIO allows the seamless bluetooth integration for all vehicles supported with GROM Audio USB, iPod/iPhone and AUX interfaces. Allows for a wide set of functionality to be added: Bluetooth Hands free (HFP), Bluetooth Audio playback (A2DP), Bluetooth wireless audio control (AVRCP).

Product Features:

  • Compatible with all GROM Audio USB, BT3 and MST3 interfaces modules
  • Plugs directly to the extension port of GROM box
  • Gives wireless handsfree calling (accept/reject call)
  • Allows for wireless A2DP playback with AVRCP control
  • Compatible with large number of phones
  • Omnidirectional microphone with swivel mount for easier installation (10ft)
  • Plug and play
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty


  • Hands free mode: able to accept call, reject call, adjust microphone gain and audio volume - all using car stereo and steering wheel controls
  • Bluetooth Audio playback: allows you to stream the music directly from your phone to the car stereo. Now you are able to listen to your MP3s or Pandora played from your mobile phone on car stereo
  • Bluetooth wireless audio control (AVRCP): allows you to control music tracks forward and reverse from your Factory Stereo or Steering Wheel Controls. Works with most music applications including Pandora

Product Specifications

Compatible Brands
This is the manufacturer(s) that the item is compatible with. Unless it is universal, usually the item will only be compatible with the same manufacturer.

For example, a JVC Bluetooth adapter will only work with JVC units. A Pioneer iPod adapter will only work with Pioneer head units.

GROM Audio
Microphone Included
Some units that require a microphone come with one, while others do not. This designates whether the item includes a microphone.
Bluetooth Version Compatibility
Which version of Bluetooth the device is compatible with. Is it important that the both devices being paired are the same version of Bluetooth. For example, a Bluetooth version 2.0 cell phone can be paired with a compatible version 2.0 headset.
Version 2.1
Full Duplex
Full Duplex communication allows simultaneous two-way communication. Each person can speak and be heard at the same time. Also know as Double Duplex.
Primary Color
This is the main color of the item.
Remote LCD Display
Some devices (such as remote controls) feature an LCD display to show information such as text, pictures, icons, or other helpful information.
A2DP Music Streaming
A2DP Music Streaming allows the user to transmit music wirelessly from a cell phone, tablet or other compatible device.
Number of Supported Devices
The number of devices the product can be paired to simultaneously. While only one device can be active at a time, this feature saves you the hassle of re-pairing devices every time you want to use them.

Stereo & Vehicle Specifications

Stereo Compatibility
This feature details the type of in-dash car stereo receiver that the item you are viewing is compatible with or made for. A Factory or OEM stereo is what is included when the vehicle is manufactured (eg. the original Ford car radio is the OEM or Factory stereo). An Aftermarket car stereo refers to a car stereo made to work in many vehicles. Aftermarket stereos are made by companies such as Sony, JVC, Dual, Jensen, Pioneer and others. Universal compatibility refers to an item that works with any kind of car stereo receiver.
Original Vehicle/Stock Stereo (OEM)

Specials with this Item

Promotions we have offer More Ways to Shop for items that are on clearance, last chance, special offer and sales, Made in America, and more!

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
4 Star
3 Star
2 Star
1 Star

Average Attribution Rating


vero beach, FL

great device

September 20, 2014

my brother told me about this device, works as advertised and more...I have it installed on an '05 odyssey and use it for music and hands free phone.

84 of 100 found this helpful

Was this review helpful to you?


Lancaster, CA

BT Dongle works very well

July 8, 2013

Anybody who works with BT on a regular basis knows that Apple i-devices can be somewhat finicky. This BT dongle, paired with one of the GROM interface boxes has no such problems. I have tested this with the iPhone4, 4s and 5. Works well, sounds GREAT. Audio quality can also sometimes be an issue streaming BT, but not with the GROM BTD.

77 of 92 found this helpful

Was this review helpful to you?


madison heights, mi


October 9, 2013

overall, for music and audiobook listening, this is great, for calls, the microphone picks up the other persons voices, causing an echo. I have tried relocating the mic, and also wrapping the end of it, to "direct" it to only receive my voice waves, and i cannot get the echoes to stop.

76 of 91 found this helpful

Was this review helpful to you?




September 17, 2013

Purchased a GROM Audio BTD. The item was delivered fast and at a reasonable cost

74 of 89 found this helpful

Was this review helpful to you?

Big Daddy JoeJoe

Birmingham, Alabama

easiest bluetooth to install

October 27, 2014

This was plug and play. The entire setup plugs right into my factory stereo... Which Honda made difficult to replace. Now I have Bluetooth for safety and streaming music.

71 of 87 found this helpful

Was this review helpful to you?

matts extra

Englewood, CO

excellent product

August 30, 2015

Works flawlessly with the factory stereo. Excellent sound quality and ability to charge you phone.

17 of 21 found this helpful

Was this review helpful to you?

Accessory Tools and Products

Accessories added

GROM Audio 35MDN

5 Ft. GROM Mini Din to 3.5mm Cable With High Quality Sound

Your Price $9.75

GROM Audio C-35USB

5 Ft 3.5mm Auxiliary Input Audio Cable with 5 Volt USB Charging

Your Price $14.99

Browse 6 questions and 12 answers
Hide answersShow all answers | Sort by
Why did you choose this?
Sonic Electronix Store
I'm trying this over the USA Spec from Crutchfield because I believe this has a direct controllable input where the USA Spec doesn't. As a back up....I know it will work with USB memory sticks
TRENT G on Feb 15, 2016
Needed a way to integrate bluetooth streaming into a 2006 Lincoln Zephyr factory navigation system.
Tom L on Feb 8, 2015
I installed one of these in my son's BMW. He was real happy with it so I ordered one for my car.
Will T on Oct 10, 2015
Great add-on item to complete hands free calling
Ted M on Jan 1, 2015
Can I listen to the factory radio and still use the bluetooth, or does the the radio have to be set to a certain station. Or do have to stream music through my phone to use bluetooth features? Does it automatically mute car stereo when a call comes in?
Mark K on Mar 22, 2015
Best Answer: I can't comment on the radio, I never use it. I have the ipod adapter and bluetooth. When receiving calls it stops the ipod when it rings, you hang up, and playback resumes; I'm going to assume it's the same for radio because the bluetooth and ipod are two seperate settings/menus (ie ipod is selected and automatically switches to bluetooth and back).
Reply · Report · matthew m on Mar 22, 2015
· Add Answer · I Have This Question Too (0)
IS BTD unit compatible with OM stock audio unit in 2004 Land Rover discovery?
david on Dec 23, 2014
Best Answer: Hello David,

Absolutely not, the BTD is intended for either of the GROM-USB, GROM-BT3 and GROM-MST3 . Unfortunately, neither of the listed modules specify your vehicle;

Reply · Report · Customer SStaff on Dec 23, 2014
· Add Answer · I Have This Question Too (0)
I have a 2007 Pontiac G6, that does not have a satellite radio capability - will this product work for my vehicle? If so, what other products would I need to make it work?
Lex_B on Dec 11, 2014
Best Answer: Hello,

Unfortunately, The BTD is only an Extension, and is intended to be extended from a GROM Module. Of which, none of the GROM Modules are compatible with your vehicle. In addition, we cannot find a solution that is compatible, from any other vehicle. We encourage you to contact PAC for a possible answer.
Reply · Report · Sonic Electronix SStaff on Dec 14, 2014
· Add Answer · I Have This Question Too (0)
I have a 2014 Mini Cooper S Paceman that came with the BT phone integration but no A2DP capabilities. I am looking for something that can integrate into it. Preferably something in-dash or CD replacement, as I have no use for a CD player. Does something for this model exist?
C-lund on Oct 8, 2014
· Add Answer · I Have This Question Too (0)
I have a nissan 2011 armada with no navigation and no bluetooth what is the best product for this Suv. Is there a product that i can do all from the screen i all ready have?
A shopper on Sep 20, 2014
· Add Answer · I Have This Question Too (0)

Product Summary


Model Number






Internal SKU


Internal Product ID


Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: GROM Audio BTD