Features: LCD digital voltmeter helps you immediately detect and measure the current voltage of the outlet, which is convenient and practical to check the power condition of devices, preventing damaging your appliances by too high or too low voltage. There is an internal potentiometer for adjusting the accuracy. Just open the outer cover with a screwdriver and adjust the potentiometer with a small size screwdriver. When the voltage is too high, adjust the potentiometer counterclockwise, but if the display voltage is too low, adjust the potentiometer clockwise. The digital display with blue backlight makes it possible to view the current data clearly even at night or in dim light. It can be used not only as a voltmeter, but also as a night light. Plug-in voltmeter is easy to use and perfect for measuring AC voltage in home, office, industrial and mining enterprises, etc.. Measuring ranges is 80-300V. Made of high-quality PC retardant material, with nice insulation effect, safety and reliable. Compact size, does not occupy space, lightweight design, easy to transport and storage. Specifications: Color: White Material: PC Measuring Ranges: AC 80-300V Installation Size: 56 * 60 * 41mm/ 2.2 * 2.4 * 1.6in Package Size: 80 * 60 * 50mm/ 3.1 * 2.6 * 2.0in Package Weight: 40g/ 1.4oz Packing List: 1 * Voltmeter