Features: Function via Bluetooth-enabled devices No functional limitations of the car radio Allows you to connect an external audio source This cable is with Bluetooth module and microphone. Adopt Bluetooth 5.0 protocol, backward compatible with 2.0 3.0 4.0 other versions of Bluetooth protocol, can support common MP3 format audio, also support for WMA, for WAV, for FLAC, and other high-quality audio format decoding, non-universal ordinary Bluetooth function, can support DSD Large-capacity transmission, stable data transfer between devices, fidelity, designed for music enthusiasts. Specification: Item Type:Car Bluetooth 5.0 Aux Cable Fitment:For A6 A8 2006-2008 J523 (Fits MMI 2G Panel Only) Installation: 1. Just insert the connector into the AUX socket at backside of the radio host. 2. Connect the red wire to ACC 12V+, black wire to GND 12V- in Power Port. 3. Match mobile phone with the Bluetooth Module ( It is bluetooth 5.0 version, not need password when connecting ) 4. Choose Aux from the radio panel or audio source list. 5. Play mobile phone music through car speaker & answer calls by microphone. colour: black Material: ABS Package Contents: 1 x Audio Cable Adapter 1 x Bluetooth microphone 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.