Dual USB Port & QC 3.0 Fast ChargingThe car charger has 2 USB ports, which can charge two devices at the same time and has overcharge protection to ensure safe charging. One is the QC3.0 fast charging port, the other usb port(5V/1A) with music icon can read USB disk.Hands-free CallingBluetooth 5.0 transmission technology allows fast connection and stable signal. Hands-free design makes your driving easier and safer. Supports Siri, Google voice navigation. Rotate the button to easily select FM channels and Play/Pause/Answer/Hang up phone calls.LED Digital DisplayThis FM transmitter is designed with blue LED lights, you can see the button clearly in the darkness. It will automatically switch on and show the battery level of your car. Keep abreast of car battery health at all times and drive safely when driving at night.Crystal Clear Sound- Hi-Fi Deep Bass Built-in microphone with CVC noise reduction technology to create full duplex sound quality. You can enjoy the fantastic deep bass music by pressing the EQ button. Car adapter supports Bluetooth play,USB Disk and TF card paly(Max 32GB).Easy to Setup Plug this wireless car kit into the cigarette lighter socket, tune your car FM radio to a blank station(87.5-108.0MHz), and adjust this FM transmitter to the same one; Pair with your phone via Bluetooth 5.0, then there you go.