This usb port for car with two QC3.0 fast charging ports, with a total power of up to 36W. It can charge two compatible devices at the same time, and the charging speed is 4 times faster than traditional charging. Backward compatible with Quick Charge 2.0 and 1.0. Suitable for all popular USB devices. Note: After the vehicle is turned off, the on-board charger can consume up to 30mA of current. Made of Aluminum alloy with better heat dissipation, which has advantage of non-flammable, wear resistant and good stability. Upgraded metal car charger will not be overheating at high temperatures, which is safer than plastic one. With a LED voltage display that can show the voltage status of car battery in time. Very convenient for car, boat, bike, SUV, ATV, RV car, campers and motorcycles, etc. FAST FREE SHIPPING!