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

good price fast shipping

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.