HUAHA AC 80-300V LCD Digital Volt Meter Voltmeter US Plug Electric Pen Voltage Testers Electrical Instruments -Volt Panel Meter Voltage Tester Gauge (White)

Knowing the volts in the rv when plugged in at the campground is better than being blissfully ignorant and possibly damaging electric items such as AC. I watched the meter go from 124 to 112 in a recent campground; it varied depending on how many rigs were on the system and their power usage.

Easy to read, accurate, simple, reliable, good for R/V 120V plugs to check inverter.

plugs in to a/c outlet in my motorhome lets me know instantly what the voltage is when plugged in to shore power it is small enough to not be obnoxious

Works great. Already saved my RV. Was at a campground with 150 volts. Turnded power off and had them fix it

This works well. I leave it plugged into my RV. Reads constant voltage and it lights up. Just plug it in.

Works as expected. I use this to monitor the voltage when my Motorhome is plugged in at campgrounds

I put this in my RV. It solved a frustrating problem. It was often difficult to tell the quality of power at different places where I parked. Sometimes I had to use long extension cords to plug in at friends houses, etc. Voltage drop can be pronounced over long distances, so with this device, I can tell the exact status wherever I am parked. I am amazed that they dont build them into every RV (although they are becoming more common).

Works as advertised.

I use this to monitor how much voltage I have in my house. Avoid the upcoming brownouts and also once generator kicks in monitor its output.

works great