Features: 1.Professional manufacturing, this is perfect to fit for MMI AMI 3G / Q5 / A4L / A6L / Q7 / A5 / S5. 2.The 4?pin and 12?pin connectors plug into the back of the CD host connector. More stable connection, remarkable performance, easy to plug and play installation. 3.Unconventional Bluetooth function can support DSD large-capacity transmission. You can hear music from your phone/tablet/mp3 (they should have Bluetooth capabilities). 4.Bluetooth version 5.0, compatible with other versions of Bluetooth 2.0, 3.0, 4.0, 5.0, can support commonly used MP3 format audio, and also support WMA, WAV, FLAC and other high?quality audio format decoding. 5.Match your mobile phone or tablet to the Bluetooth module, then select AUX from the radio, and then you can use your mobile phone to play music through the car speakers. Specification: Item Type: Bluetooth Audio Cable_x000D_ Material: ABS+Aluminium_x000D_ Voltage: DC12V_x000D_ Bluetooth: Bluetooth 5.0_x000D_ Transmission Range: Approx. 5m/16.4ft_x000D_ Fitment: Fit for MMI AMI 3G / Q5 / A4L / A6L / Q7 / A5 / S5_x000D_ _x000D_ _x000D_ How to Use: _x000D_ 1. Find the socket of the pin on the car (on the back of the radio)._x000D_ 2. Install it directly and install the power cord. Note: 1. 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 original MMI system, press SETUP+CAR five seconds Enter the green menu project module, find the AMI modified code AMI changed 1/2._x000D_ 2. Only audio playback, can not be controlled by the steering wheel, can not be used to answer calls._x000D_ 3. If you want to open the AUX function, this project needs to modify the code.