Bluetooth 5.0 audio receiver, with rich interfaces and powerful functions, allowing wired devices to turn into Bluetooth functions in seconds, with multiple interface options to meet the needs of various devices. Volume control: turn left for a long time to increase the volume/rotate right for a long time to decrease the volume, choose music: turn left for a short time to play the previous song/rotate right for a short time to play the next song/ Pause: short press the encoder to play or pause the music . Connect the AUX interface of old-fashioned speakers or power amplifiers to solve the problem that the speakers have no Bluetooth and cannot use Bluetooth to play. Listening to songs/navigation/calling is correct, and the driving is safer and the AUX connection is more stable.