[7 color LED backlight modes] 7 monochromatic lighting modes and 1 cycle color mode, you can visually obtain stunning color display, you can keep 1 color or play colors in turn. It can help you use it easily in the dark and drive safer. [PD & QC USB CHARGER] Suitable for 12V/24V car cigarette lighter socket. The car adapter can quickly charge two devices at the same time through the PD3.0 and QC3.0 ports. PD Port can be compatible with Samsung, iPhone, Google, fast charge from 0 to 50% in half an hour. The Quick Charge 3.0 port can charge the device from 0% to 80% in 35 minutes. [Hands-free call] Connect the mobile phone and the Bluetooth adapter via Bluetooth, answer/redial/hang up or reject the call with one key. Built-in microphone and noise suppression (CVC) technology enable clearer hands-free calls. You can focus on the road to make your driving more interesting and safer. [MUSIC CONVERTER] Connect the car radio and Bluetooth adapter through the FM modulator channel. Then you can enjoy music from Bluetooth device/TF card (64GB)/U disk (64GB) to car audio. [Safe use] Built-in over-current protection, over-voltage protection, short-circuit protection, effectively prevent multiple problems.