Review on 🚗 Cllena Dual USB Charger with Voltmeter, Power Outlet, Toggle Switch - Ideal for Car, Boat, Marine, RV, Truck, Camper, GPS, Mobiles - Green by Ryan Noble

I just installed it yesterday and I'm very happy. I installed it in an RV and it's so handy. Allows battery voltage to be displayed and allows mobile phones, tablets and other devices to use the USB port for power supply. Has an LED light in the power button so you can tell if the panel is powered on. There are no wiring instructions, but the polarity for each block is clearly marked and the blade terminals are silver and gold. Supplied with insulated clamps (6) and fixing screws (4). You can connect this in multiple configurations to suit your needs. I wired it so that the 12VDC was in series to the switch and all other devices were connected in parallel to the switch. Thanks!