General description This 4 in 1 Charger Socket Panel is designed for easy installation and use in vehicles. It features a 12V RV USB socket, an LED digital display voltmeter, a 12V cigarette lighter socket, and an LED rocker switch. The panel is also removable, allowing for the replacement of charger sockets as needed. Technical specifications Input Voltage: 12V USB Output: 5V/2.1A (total 4.2A) LED Voltmeter Display: 5-48V Service Life: Up to 10,000 cycles Compatibility and accessories Includes: 1 x 4 in 1 Charger Socket Panel 4 x Stainless Steel Screws 9 x Blue Terminals Usage This dual USB charging socket can charge two devices simultaneously while monitoring the battery status of your car or boat through the real-time LED voltmeter. The additional cigarette lighter socket provides convenience for other devices in your vehicle. Other information Overload protection against overheating, overcurrent, and overload Intelligent current identification for optimal charging LED rocker