Linkstyle 4 in 1 12V Switch Panel, Waterproof USB Outlet Charger Socket Dual 5V 2.1A Ports, ON/OFF Rocker Switch, LED Digital Voltmeter & Cigarette Lighter for Car Marine RV Boat Truck

4 in 1 Multifunction: Toggle switch panel includes a 12V USB outlet, LED voltmeter, 12V cigarette lighter outlet, and LED toggle switch. Easily customize or replace sockets as needed Dual USB Charger: Campervan switch panel has 2 USB-A ports with waterproof covers, each delivering stable 5V/2.1A output for continuously powering dash cams, GPS, and other low-power devices Voltage Monitoring: Digital voltmeter monitors 6–24V with a bright LED display for clear night visibility, enabling real-time battery status monitoring and preventing low-voltage issues LED Switch: Rocker switch has a lifespan of up to 10,000 cycles and is equipped with a cigarette lighter socket for powering car refrigerators, vacuum cleaners, and other auto accessories Safety Protections: 12V control panel features an intelligent monitor with overcurrent, overtemperature, and overvoltage protection, suitable for cars, boats, RVs, trucks, and other vehicles