Review on ⚡️ Waterproof Digital Round Panel Voltmeter – 2 Piece Set for 12V DC Car Voltage | LED Display | Compatible with Vehicle Motorcycle Truck Camper Caravan ATV UTV Car Boat Marine | Red Digital by Kevin Schnitzer

So I drilled a hole and routed the wires (no going back now) I connected it to the switch so it doesn't work all the time. Anyway, I pulled out my multimeter to see how accurate it was, on the meter it showed 13V, on my multimeter it showed 13.28 (battery voltage) on the source and on the back of the meter itself. Of course ... It's not much different. It connects to the car battery that I use for my trailer tent to turn on the extra lights. I use it to see on the fly if I need to charge the battery or not. I haven't tested the second one, but I expect the numbers will be close. Time will tell if this continues. The 0.3 volt cut doesn't bother me as it reads less, not more. Would I buy them again? I doubt it. I'll roll the dice for something more specific