【Quick Charge 3.1】: 3.1A dual USB smart charging, one 3.1A, one 1A, efficient and fast charging, and quickly charge compatible devices to 80%. 【U disk/TF plug and play】: You can play music on the car stereo via Bluetooth/U disk/TF card, Bluetooth hands-free call, one-key operation, advanced noise reduction technology will ensure quality, no stuck Pause, make the sound quality more shocking. 【7-color LED optional】: Support 7 colors of LED backlights, including red/green/blue/yellow-green/purple/cyan/orange, with ambient lights in the car, adding mood to the night. 【Safety function】: Equipped with multiple protections such as voltage detection function, over power protection, over current protection, short circuit protection, over voltage, etc., it is more assured to use. 【Widely compatible】: Adapt to 12V~24V car models, compatible with all kinds of mobile phones, tablets, earphones, MP3 and other devices.