4 Charging Ports The car phone USB charger is equipped with four charging ports, including PD/20W, QC3.0/18W, USB 2.4A/12W, which can charge 4 phones or tablets at the same time. LED Voltage IndicatorCigarette lighter usb charger monitors vehicle battery and electrical system and displays vehicle voltage on the screen. 4 port usb charger adapter is suitable for electric energy vehicles, cars, trucks. Easy to CarryThe size of 12 volt socket adapter is about 1.5" x 2.4" and 30g in weight, taking up little space and not hindering driving. Ideal for car travel. Multiple Safety ProtectionThe car lighter usb adapter provides short circuit protection, over voltage protection, over temperature protection, over current protection, under voltage protection, etc. The usb car charger socket provide security for your car and charging equipment. 24/7 After Sales ServiceIf you have any questions, concerns or suggestions about the car charger, please feel free