Features Comprehensive Electrical Measurements: Accurately measure voltage, current, active power, and energy to monitor your electrical systems efficiently Overload Alarm Functionality: Receive instant notifications with a flashing backlight when power exceeds preset limits, ensuring safety and preventing damage Customizable Power Thresholds: Easily set your own power alarm thresholds to tailor the device to your specific monitoring needs for enhanced control Convenient Backlight Feature: Activate the backlight with a simple key pr, which remembers its last state even after power loss for effortl usability Large LCD Display: Enjoy clear visibility with a spacious screen that simultaneously shows voltage, current, power, and energy parameters for quick assments Features: 1、Electrical parameter measurement function (voltage, current, active power, energy). 2、Overload alarm function (over power alarm threshold, backlight and power flashing to alarm). 3、Power alarm threshold preset function (can set power alarm threshold). 4、Backlight function, short pr the key to turn on or off the backlight, the backlight has memory function, it can store the on or off state when power off. 5、Display interface is large-screen LCD, it can display voltage, current, power, energy parameters at the same time. Specification: Features: Electrical parameter measurement function (voltage, current, active power, energy). Overload alarm function (over power alarm threshold, backlight and power flashing to alarm). Power alarm threshold preset function (can set power alarm threshold). The reset function of energy key. Store data when power off. Backlight function, short pr the key to turn on or off the backlight, the backlight has memory function, it can store the on or off state when power off. Display interface is large-screen LCD, it can display voltage, current, power, energy parameters at the same time. Specification: 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 Power Test Range: 0~4.5kW (within 1KW, the display format is 0.0~999.9W; 1KW and above, the display format is 1000~4500W.) Energy Test Range: 0~9999kWh (within 10KWh, the display format is 0~9999Wh; 10kWh and above, the display format is 10~9999kWh.) 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