and high quality The bluetooth module is made for MMI 3G. Compatible for Q5, A4L, A6L, , A5, S5. This 4-pin and 12-Pin connector is inserted into the back of the CD connector.connect your phone with bluetooth. Bluetooth 4.0 version, and compatible with 2.0 3.0 4.0 other versions of Bluetooth, can support the commonly used MP3 audio, also support the WMA WAV FLAC, and other high-quality audio decoding, non-ordinary Bluetooth functions, can support DSD capacity transmission. AUX from your radio and you can from your phone in your car. Match your phone or pad to bluetooth module.and Aux from your radio, then you can use your phone to through car speakers. You can hear music from your phone/pad/mp3(They should have blueooth function). P.S:Only audio playback, can not be steering wheel control, can not be used the phone. If you to open the AUX function, this item needs to the code. Note: Select the 5053 into the 5F electronic module, and then select the match 10, into the channel 06, after reading, save the digital 0, the new data 1, and then into the MMI system, press SETUP+CAR seconds Enter the green project module, find the modified code changed 1/2. Specification: Bluetooth: V4.0 Range: 5m Material: ABS Dimensions: 3x5.3x0.5cm/1.18x2.09x0.2inch Cable length: 27cm Color: Black : 1 Pc Package Contents: 1 * Bluetooth AUX audio cable Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.