Dual USB Charger Switch Panel 4 in 1 Car Adapter 12V Socket with LED Voltmeter [4.2A dual USB charging connector] Our automotive charging socket is equipped with 2 USB ports (5V or 4.2A). Two devices can be charged simultaneously. [Car cigarette lighter socket]The car cigarette lighter socket can charge 12 24 VGA power, GPS device, seat heater, vacuum cleaner, air humidifier, pump, air purifier, etc. [Safe power switch] Updated USB connector with on or off switch to save energy, protect devices and extend the life of devices. stores electricity and consumes no energy when switched off. [LED voltage indicator] With LED digital voltage monitoring, you can monitor the status of your vehicle's battery and electrical system in real time. The light helps you find USB ports quickly and easily in the dark. [Wide application and installation] Our USB charging socket with aluminum alloy housing and CE or FCC certification. Fits bridge DC 1224V vehicles. specification Power Input: DC 12V-24V Output of each USB port: DC 5V or 4.2A Power Jack: DC 12V Voltmeter Display range: DC 5-30V Working Temperature: -2580 Material: ABS, aluminum plate. Weight: 130g Attention The voltage can only be displayed when the car charger is connected to the power supply and the button is turned on. Dual USB charging ports With two USB 5V charging ports (2.1A or 2.1A), you can charge 2 devices simultaneously at high speed. 12V power socket The socket offers a total power of up to 12 V, which is sufficient for the daily use of various portable devices in the vehicle. LED digital voltmeter Monitor the vehicle's electrical system, you can know the condition of the vehicle at any time. Switch on or off Equipped with switches for energy saving and equipment protection that can extend the life of the device. Easy to change and DIY It is easy to disassemble and can be connected according to your DIY requirements. Easy to install The terminals on the back are marked with " and "-" for positive and negative poles. Widely used Not only fit DC 12-24V cars, but also great for boats, ships, caravans etc.