Description: Built in Premium LCD Digital Display with Black Character, this test can immediately detect and measure the current voltage by connecting to the switch plug or the other kind of wall socket. It allows you to check on power health of devices for preventing the low voltage damage to your valuable household appliances. Measuring range: AC80-300V, Consume Power: Less than 1W(about every 1200hours consume 1 kilowatt-hour). 2 Prongs Flat US Plug with Compact Size Design is ideally applicable to measuring the AC voltage in family, office space, industrial and mining enterprises, etc. 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. This Volt meter is for more than just measuring voltage. With its soft blue backlight feature, it can be also used as a night light and a simple electrical test pen, while enabling you to view the data even in dim atmosphere. Specification: Measuring Accuracy : 1.5%+/-2 word Measuring Range : AC 80-300V Consume Power: Less than 1W(about every 1200hours consume 1 kilowatt-hour). Plug Style : US Style Number of Digits : 3 Digits. Dimensions: 53mm(length)*38mm(width) Color: White Package Includes: 1x US plug LCD Digital voltmeter