6 Parameters Display at the same time. Voltage Range: AC 40-300V, Current Range: 0-100A, Active Power: 0-30000W, Electric Energy: 0-99999kWh, Frequency: 45-65Hz, Power Factor: 0.00-1.00PF. When power off, the electric energy data will be stored and memorized, when the power is reconnected, this watt meter will go on cumulating data. Data reset for multiple measurement needs. Press the reset button for five seconds, the kwh usage meter will be reseted. 6 Different Colour Display, 178 viewing without dead angle, with backlight function, this ac power meter single phase is clearly visible whatever day or night. This single phase power consumption meter features high quality ABS flame resistant material and percision chip, making it safe to use. Real-time monitoring of household electricity consumption, helping you lower power consumption and save money. This 6 in 1 Electricity Usage Monitor is easy to install and can be used indoor or outdoor. it can be used , school, market, industry, laboratory, etc.Notes: This energy meter can be used to measure non-standard sine wave from inverter. 6 in 1 Electricity Usage Monitor This single phase energy meter can measure AC voltage, AC current, active power, power factor, frequence and electric energy at the same time. The power meter have a colorful, full-view, highdefinition LCD to display the measure parameters. Main Function: Electrical parameter measurement function Data reset Store data when power off Colorful, full-view, high definition LCD screen Backlight function Specification: Built-In CT Color: As Shown Material: ABS Package Contents: 1 pcs x AC Monitor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.