Dual QC3.0 USB Charging PortsThe car cigarette lighter charger has two 36W QC3.0 charging ports (each port outputs 18W/3A.). The plug offers the fastest charging efficiency up to 80% in 35 minutes, four times faster than traditional chargers. It is compatible with QC 2.0 and 1.0.Color LED Voltage DisplayMonitor the vehicle electrical system. You can know the status of your vehicle at any time. LED indicators help you find the charging port easily without distraction while driving.SwitchPress the switch for one second, the voltmeter LED and USB port work normally; then press the switch for one second, the voltmeter light will go out and the USB port will work normally; then press and hold the switch for two seconds, the voltmeter and the USB port will be closed.Perfect Compatibility The USB cigarette lighter adapter, compatible with all Android and iOS mobile devices, allows fast charging of devices. Perfectly compatible with car cigarette lighter sockets.High QualityThe car charger is made of special metal material, it can work normally in high and low temperature environment (-20-60). Built-in smart chip, through a series of security certifications.