4-in-1 Marine Switch Panel, 12V 4.2A Dual USB Socket Charger Power Outlet with LED Voltmeter and Cigarette Lighter

4-in-1 Charger Socket Panel - This 12V socket panel is designed with a 12V RV USB socket, a digital LED voltmeter, a 12V cigarette lighter socket, and an LED rocker switch for easy installation and use. It's also removable for replacing other charger sockets or anything else that fits. Dual Waterproof USB Charging Sockets - This 12V car USB socket has two built-in USB charging ports, with two output ports: 5V/2.1A and 2.1A (4.2A total). It will automatically detect your device and charge two devices simultaneously. The real-time LED voltmeter's large digital display shows a voltage from 5 to 48V. If the voltage is within normal limits, you can monitor the battery status of your car or boat. The LED rocker switch is easy to use and has a long lifespan of up to 10,000 cycles. The additional cigarette lighter socket is convenient for other devices in your car. Overload protection - Protection against overheating, overcurrent, and overload; this dual USB charger socket can also intelligently identify the most suitable current for your device. Package contents: 1 x 4-in-1 charger socket panel, 4 x stainless steel screws, 9 x blue terminals.