Yeeco LCD Digital Voltmeter, Flat US Plug in Voltmeter Volt Panel Meter AC 80-300V, Voltage Tester 110V 220V, Voltage Measuring Monitor, Gauge Household Power Amp Meter;

AC 80-300V US plug LCD Digital voltmeter volt panel meter voltage tester gauge
plug type digital voltmeter widely used in AC80-300V mains measurement.
The instrument directly inserted in the flapper or plugged into a wall switch can display the current mains voltage
(Family, office space, industrial and mining enterprises, etc.),
The biggest advantage is that when you see the current voltage is too low or too high, you can choose to switch off the running of a household appliances or equipment, In order to effectively protect your home appliances and equipment life (You can also be a simple voltage test table).
Potentiometer adjust:
use screwdriver to open the outer case of the voltage meter
use screwdriver in small size to adjust the potentiometer
if display voltage is too high, adjust potentiometer in counter-clockwise
if display voltage is too low, adjust potentiometer in clockwise
packing including：
1x US plug LCD Digital voltmeter