Review on 🔌 4 in 1 Charger Socket Panel with LED Voltmeter, 12V 4.2A Dual USB Charger Socket Power Outlet, Cigarette Lighter Socket, and LED Lighted ON Off Rocker Toggle Switch for Car Marine Boat RV Truck by Chris Cruz

This is a good power supply for 12V DC in an RV. The weird thing is that it came with no instructions showing the little switch is SPST only and the third pin is used as ground for the internal LED. If you're expecting a regular SPDT switch based on the three-terminal configuration, it would be easy to miswire it. Several pieces of scrap wire are needed since only crimp connectors are provided. The size of the hole required to clean the assembly leaves a very small flange width for the mounting bolts. Cut carefully.