Features Electrical parameter measurement function (voltage, current, active power, electric energy), overload alarm function. Backlight function, short press the button to turn on or off the backlight, the backlight has a memory function. Power alarm threshold preset function (power alarm threshold can be set). Energy key reset function, power off to store data, store on or off state. The display interface is a large-screen LCD, which can simultaneously display parameters such as voltage, current, power, and electrical energy. Features: -Electrical parameter measurement function (voltage, current, active power, electric energy), overload alarm function. -Backlight function, short press the button to turn on or off the backlight, the backlight has a memory function. -Power alarm threshold preset function (power alarm threshold can be set). -Energy key reset function, power off to store data, store on or off state. -The display interface is a large-screen LCD, which can simultaneously display parameters such as voltage, current, power, and electrical energy. Specifications: Brand: PEACEFAIR Model: PZEM-021 Working Voltage: 80~260VAC Test Voltage: 80~260VAC Rated Power: 20A/4500W Operating Frequency: 45-65Hz Measurement Accuracy: 1.0 grade Voltage Test Range: 80~260V Display Format: 80~260V Current Test Range: 0~20A Display Format: 0.00~20.00 Weight: 84g(approx.) Package Includes: 1 x Meter Package List