Features: 1.High compatibility, support common MP3 format audio, also support for WMA, for WAV, for FLAC, and other high?quality audio format decoding. 2.Can provides stable data transfer, hi?fi and efficient music transmission, perfect for music enthusiasts, support DSD Large?capacity transmission. 3.Adopts Bluetooth 5.0 protocol, backward compatible with other versions of Bluetooth protocol like 2.0, 3.0, 4.0. 4.Match your phone or pad to bluetooth module, choose Aux from your radio, then you can use your phone to play music through car speakers. 5.You can hear music from your phone/pad/mp3, support call answer function with clear sound. 6.Professional manufacturing for high quality, stable connection, outstanding performance, plug and play simple installation. Specification: Item Type: AUX Audio Cable Material: ABS Voltage: DC12V Bluetooth: Bluetooth 5.0 Microphone Cable Length: Approx. 150cm/59.1in Fitment: Fit for A2 2006 onwards with Quadlock connector and AUX button or AUX displayed when scrolling through available sources Fit for A3 2006 onwards with Quadlock connector and AUX button or AUX displayed when scrolling through available sources Fit for A4 2006 onwards with Quadlock connector and AUX button or AUX displayed when scrolling through available sources Fit for TT 2006 onwards with Quadlock connector and AUX button or AUX displayed when scrolling through available sources How to Use: 1. Find the 12pin socket on the car (on the back of the radio). 2. Install it directly and install the power cord. Note: Please allow light error due to manual measurement. Thanks for your understanding.