1、Professional manufacturing, this is perfect to fit for MMI AMI 3G / Q5 / A4L / A6L / Q7 / A5 / S 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 0, compatible with other versions of Bluetooth 0, 0, 0, 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. 2 x Disassembly Tool1 x AUX Bluetooth Adapter  Item Type: Bluetooth Audio CableMaterial: ABS+AluminiumVoltage: DC12VBluetooth: Bluetooth 5.0Transmission Range: Approx. 5m/ 16.4ftFitment: Fit for MMI AMI 3G / Q5 / A4L / A6L / Q7 / A5 / S5How to Use: 1. Find the socket of the pin on the car (on the back of the radio). 2. Install it directly and install the power cord.