[Dual QC3.0 USB Ports] Two QC3.0 18W/3A fast charging ports and 4x faster than traditional chargers. Backward compatible with Quick Charge 2.0 & 1.0 Suitable for all common USB devices. Note: The car charger consumes a maximum of 30mA when the car is turned off. [All Metal] Made of aluminum alloy with better heat dissipation, which has the advantage of being flame retardant, wear-resistant and has good stability. The upgraded metal car charger will not overheat at high temperatures, which is safer than plastic. [Digital LED Display] With an LED screen that can display the car battery voltage status in time. Very convenient for car, boat, bicycle, SUV, ATV, RV, caravan and motorcycle, etc. [All-round Protection] The QC3.0 dual USB charging socket meets the highest safety and quality standards. Provides overload, overvoltage, overcurrent, overtemperature and short circuit protection. [Easy Installation] The installation of the USB plug is very simple: + is inserted into the positive pole and - is inserted into the negative pole. It can also be connected to an on/off switch to save energy. Product dimension: 1.45 x 1.92 inches.