【4.2A Dual USB Charging Ports】Our car charger socket is equipped with 2 USB ports (5V/4.2A). You can charge two devices simultaneously. 【Cigarette Lighter Socket】A cigarette lighter socket can provide 12V~24V DC power and charge camera, GPS, seat heater, vacuum cleaner, car humidifier, air pump, air purifier, etc. to prevent the internal circuit from water, dust, breadcrumbs and hair falling into it. 【Safe Power Switch】Updated USB socket designed with an on/off switch to save energy, protect devices and increase their lifespan. It retains electricity and does not consume power when turned off. 【LED Voltage Display】The LED digital voltage monitoring function allows you to monitor the status of your vehicle's battery and electrical system in real time. 【Wide Application and Installation】Our USB charging socket with aluminum alloy shell and CE / RoHS / FCC certification. Suitable for most vehicles with a voltage of 12-24V DC.