About this item Two USB ports and fast charging.- The Bluetooth car adapter has 2 USB charging ports (5V-3.1A and 5V-1.5A) to support two devices at the same time for fast and efficient charging, the QC 3.0 port has 5W and chargingfast 18W, 80% faster than normal, you can listen to your phone's favorite music through the Bluetooth TF card/USB drive. RGB Color Light Panel - The Bluetooth Fm Transmittercar has RGB setting mode, there are 7 static modes and 1 dynamic RGB mode, it is a perfect combination of music and light mode, more romantic and fun atmosphere, will make your journey more interesting, itwill greatly simplify your driving operation with a backlight ring. Hands-free calls - When the Bluetooth connection is successfully established, you can make phone calls and listen to music normally, while the technologyNoise canceling ensures excellent hands-free calling experience.You can easily select FM channel play/pause/answer/hang up by pressing the button.you don't need to look at your phone to ensure safe driving. Wide Compatibility- This Bluetooth FM transmitter will automatically connect to the paired Bluetooth to detect music playing, suitable for various MP3 formats, WMA, SNR, compatible with smartphones and other devices, in addition, provide TF card and U disk felling, with a wider range from 87.5MHz to 108MHz, you can get a more stable and consistent music experience without interference. Car battery voltage detection.- Car FM transmitter displays car voltage when plugged into cigarette lighter.To protect the safety of your driver, the car FM transmitter has been designed so that it can be used safely.