General description This 4 in 1 Marine Switch Panel is designed for 12V applications, featuring a USB socket, LED digital display voltmeter, cigarette lighter socket, and LED rocker switch. It is convenient to install and use, and can be detached to replace other charging sockets or compatible devices. Technical specifications Input Voltage: 12V USB Output: 5V/2.1A (two ports, total 4.2A) Voltage Display Range: 5-48V LED Rocker Switch Lifespan: up to 10,000 cycles Usage Monitor battery status with the real-time LED voltmeter. Charge two devices simultaneously at optimal speed. Use the additional cigarette lighter socket for other devices in your vehicle. Other information Package includes: 1 x 4-in-1 charging socket panel, 4 x stainless steel screws, 9 x blue terminals. Overload protection features include overheating, overcurrent, and overload protection.