Upgraded 3.1 Car Transmitter with Power Off Button you will enjoy a faster data transmission rate, more stable connection, anti-interference performance and more.LAWA PD3.0 Type-C & QC3.0 USB Ports 38W fast charging Type-C port and Quick Charge 3.0 port enable you to charge your devices in 2X faster than standard chargers. The 5V/1A port is designed for playing music using USB.3 Playing Modes with Broad Compatibility : Play music from Bluetooth connection, TF card, USB disk; Support A2DP and MP3/WMA/FLAC/AAC/WAV format music.Noise-Cancelling: Built-in noise-cancelling microphone provides clear and high quality sound when making a phone call The FM bluetooth transmitter will automatically connect to your phone when it is turned on for the second time.Easy To Use; Insert the bluetooth transmitter into the car cigarette lighter, adjust the car radio to a blank FM frequency (87.5-108.0 MHz), then adjust the FM transmitter to the same frequency, and then connect your phone to the transmitter via Bluetooth to enjoy lossless music.