4 in 1
 Multifunctional Panel: Features a 12V USB outlet, LED voltmeter, 12V cigarette lighter outlet, and LED rocker switch. Easily install or replace sockets as needed
 Dual USB Charger: Built-in waterproof dual USB ports (5V/ 2.1A each, total 4.2A ) auto-detect and charge two devices simultaneously at optimal speed
 Real-Time LED Voltmeter: Large digital display shows 5-48V voltage, allowing you to monitor your vehicle' s battery status in real time
 LED Rocker Switch: Easy to use rocker switch with a long lifespan of up to 10, 000 cycles, plus an extra cigarette lighter socket for added convenience
 Safe Application: Built-in smart protect, ensuring safe and optimal charging for your devices, suitable for cars, boats, RVs, trucks ect, supporting various vehicle appliances