Dual USB Fast Charging Charge two devices simultaneously with PD3.0 fast charging Compatible with USB Type-C protocol, Quick Charge 3.0/2.0 protocol and more 3 music playing modes with colorful backlit stereo FM transmission technology for high-quality sound Supports WMA, MP3, WAV and FLAC music format files U disk playback, TF card music player and hands-free calling Easy to use Auto power off memory function for seamless music playback One-button subwoofer output and DSP technology for enhanced sound Battery voltage detection for added convenience Bluetooth V5.0 and wide compatibility Stable and fast connection with Bluetooth 5.0 technology Compatible with all types of vehicles Supports Apple 2.4A charging specification and more. Excellent crystal clear HI-FI stereo sound Enjoy excellent crystal clear HI-FI stereo sound in your car with this Bluetooth 5.0 car FM transmitter.