About this item Two QC3.0 USB Charging PortsCar cigarette lighter charger has two 36W QC3.0 charging ports (each port output 18W/3A.). The plug offers the fastest charging efficiency of up to 80% in 35 minutes, four times faster than traditional chargers. It is compatible with QC 2.0 and 1.0. LED Color Voltage Display Monitor the vehicles electrical system. You can know the condition of your vehicle at any time. LED indicators help you find the charging port easily without distracting you while driving. Switch Press the switch for one second, the voltmeter LED and USB port work normally; Then press the switch for one second, the voltmeter LED is off, and the USB port works normally; Then press and hold the switch for two seconds, the voltmeter and the USB port will be closed. Perfect CompatibilityThlevel Cigarette Lighter USB Adapter, compatible with all Android and iOS mobile devices, provides fast charging for devices. Perfectly compatible with car cigarette lighter sockets. High QualityMade of special metal material, the car charger can work normally in high and low temperature (-20 to 60) environment. Built-in smart chip, through a series of security certifications.