1Characteristic: Operate through Bluetooth enabled devices, there is no functional limitation of car radio, allowing you to connect to external audio sources. 2Purpose: Wireless Bluetooth music is the general trend, and you can also use it to watch movies and map navigation. 3Compatibility: Using Bluetooth 5.0 protocol, backward compatible with other versions of Bluetooth protocols such as 2.0, 3.0 and 4.0, 4Audio Format: Bluetooth Aux In cable can support ordinary MP3 format audio, and also support Wma, Wav, Flac and other high?quality audio format decoding. 5Stable Transmission: Unusual Bluetooth function, can support Dsd large capacity transmission, stable data transmission between devices, hifi, specially designed for music lovers.