Features : The BT module is made Replacement for Audi MMI AMI 3G. Replacement for Audi Q5, A4L, A6L, Q7, A5, S5. This 4-pin and 12-Pin connector is inserted into the back of the CD host connector.connect your phone with BT. BT 5.0 version, and compatible with 2.0 3.0 4.0 other versions of BT, can support the commonly used MP3 format audio, but also support the WMA WAV FLAC, and other high-quality audio format decoding, non-ordinary BT functions, can support DSD large capacity transmission. Choose AUX from your radio and you can play music from your phone in your car. Match your phone or pad to BT module.and Choose Aux from your radio, then you can use your phone to play music through car speakers. You can hear music from your phone/pad/mp3(They should have BT function). P.S :Only audio playback, can not be steering wheel control, can not be used answer the phone. If you want to open the AUX function, this item needs to modify the code. Note: Select the 5053 into the 5F electronic
