1、Replacement for A3, A4, A6, A8, R8, TT, etc RNS‑E navigation and replacement for Ga‑llardo RNS‑E navigation. 2、Match with your phone or tablet, and select Aux from the radio, then you can use your phone to play music through the car speakers. You can hear music from mobile phone/pad/mp3 (with Bluetooth function). 3、Adopt Bluetooth 0 protocol and is backward compatible with other versions of Bluetooth protocols such as 0, 0 and 0, and can support ordinary MP3 format audio. 4、Support WMA, WAV, FLAC and other high‑quality audio format decoding, non‑common Bluetooth function, and support DSD large‑capacity transmission, and the data transmission is stable, which can meet your needs. 5、This wireless audio adapter has fidelity for you and is specially designed for music lovers. And if the phone comes, you can answer the call, the sound effect is clear, and it is easy to install, plug and play.