USB Charger, USB Socket, Voltmeter manufacturer / supplier in China, offering Triple Function Dual USB Charger + LED Voltmeter + 12V Outlet Power Socket Panel Jack for Car Boat Marine Digital Devices Mobile Phone Tablet (Blue LED), Digital Voltmeter 12V Cigarette Socket Double USB Power Charger Adapter Flush Mount Waterproof 6 Gang Rocker Switch Panel Black for RV Car Boat, Waterproof IP67 Blue LED 12V 24V 6 Gang Car Caravan Marine Boat RV Laser Etch Rocker Switch Panel and so on.