Voltage Panel Power Line Volt Test Monitor Gauge Meter 110V 220V Digital LCD Voltmeter for RV Boat Camper Household Factory Plug

DouWide Measuring Range & Low Consumption: measuring range: ac 80 - 300V, consume power: less than 1W (about every 1200 hours consume 1 kilowatt-hour). Protect Household Appliances:Built in quality lcd digital display with blue back light.The voltage Monitor is great for immediate check on power health of devices for preventing the low voltage damage to your household appliances. Adjustable Potentiometer:There's an interior potentiometer for accuracy adjustment. just use screwdriver to open the outer coving and adjust the potentiometer with small size screw driver, adjust potentiometer in counter-clockwise when it’s excessive voltage, but if display voltage is too low, adjust potentiometer in clockwise. Versatile feature: this volt meter is for more than just measuring voltage, with its soft blue back light feature, it can be also applied as a light for night and a simple electrical test pen, while enabling you to view the data even in dim atmosphere. Wide Applications:It works well for anywhere in your home and RV,actively monitor the line voltage on the circuit, monitor in real time.It is ideally applicable to measuring the AC voltage in family, office space, industrial and mining enterprises, etc.