7 Color LED Backlight Version: This BT radio transmitter supports 7 Color LED Backlight; You can get a visually impressive representation of colors. It also facilitates safe operation and driving during night trips. Dual USB charging ports and Type-C quick charger: This auto FM transmitter with two USB ports for charging devices, has two USB charging ports, can charge two devices at the same time and has overcharge protection. Smart Type-C USB charges compatible devices up to 4x the speed of conventional charging. Hi-Fi music and 3-playback modes: This updated BT car adapter supports music playback via BT, USB drive, TF card. It can bring you an amazing listening experience with its clear and stereo sound. Hands-free: With this built-in microphone, you can easily answer, hang up, reject a call or dial the last number again with this BT FM transmitter. You can use the multi-function button to control calls and music.