The Bluetooth module is designed for MMI 3G. Compatible with Q5, A4L, A6L, A5, S5. This 4-pin and 12-pin connector plugs into the back of the CD host connector. Connect your phone via Bluetooth. Bluetooth 5.0 version, backward compatible with Bluetooth 2.0, 3.0, 4.0, and 5.0. Supports commonly used MP3 audio format, as well as high-quality audio formats including WMA, WAV, and FLAC. Capable of DSD signal transmission. Select AUX on your radio to play audio from your phone through your car speakers. Pair your phone or tablet with the Bluetooth module. Then select AUX on your radio to stream audio from your device through the car's speaker system. You can play music from your phone, tablet, or MP3 player (devices must have Bluetooth functionality). Note: Audio playback only. Does not support steering wheel controls or phone call answering. To enable the AUX function, coding modification is required. Instructions: Use 5053 to access the 5F electronic module, select match 10, go to channel 06. After reading, change the original data 0 to new data 1. Then enter the MMI system, press SETUP+CAR for five seconds to access the green menu, and locate the modified code option, changing it to 1/2. Color: As shown Material: Plastic Package Contents: 1 x Adapter Only the items listed above are included; other products are not included. Note: Lighting effects and display differences may cause slight variations in color between the image and the actual item. Measurement error allowance is +/- 1-3 cm.