Review on Switchtec 4.8 Amps Dual USB Rocker Switch Style Charger with Blue Voltmeter for Boats, RZR 900, RZR 1000, Ranger, Mobile Home, RV, Spyders, Maverick, SxS, Golf Cart, Off Road Vehicles, RV, Side by Sides: Efficient Charging Solution for Various Outdoor Vehicles by Danny Kamerer

Works well and corresponds to the description. My only small issue is that I have two of these installed side by side on my center console and they show slightly different voltage on the two screens. They are currently connected to the same power source. I'll end up connecting one to a regular car battery and the other to an auxiliary battery that isn't installed yet. When my trusty voltmeter is connected to the power wires and reads 14 volts, one screen shows 13.6/13.8 and the other 13.9/14.2. So none of them are very accurate and they are not calibrated to each other. USB ports are reliable and work well.