1AUX audio cable, allows you to listen to music from your phonepadmp3 (with Bluetooth function). Bluetooth 5.0 version, backward compatible with 2.0 3.0 4.0 and so on. 2Support common MP3 format audio, and also support WMA, WAV, FLAC and other highquality audio format decoding. 3The connection is more stable, supports DSD largecapacity transmission, and the data transmission between devices is stable and fidelity. 4Supports highefficiency music transmission, and support to answer calls, which has clear sound. Plug and play, easy and quick installation. 5Simple to operate, just match the mobile phone or tablet with the Bluetooth module, and select Aux from the radio, and then you can use the mobile phone to play music through the car speakers.