Enables safe driving, fast charging and transmits sound. Converts Bluetooth and voice to FM frequency. The device has a microphone with noise reduction and clear voice. Bass Booster. RGB LED lighting. Two charging slots-PD20W+ QC18W. Google Voice Assistant support. Automatic switching to handsfree mode upon incoming call. Shows the car battery voltage. Automatic free FM frequency search. Works from car cigarette lighter 12V/24V