HD Color LCD DisplayThis AC voltmeter ammeter is with 360 viewing without blind spots, with backlight function, it can be clearly visible day and night 6 in 1 Multimeter 1This digital energy meter can measure AC voltage 50.0-300.0V, AC current 0.0-99.99A, power factor 0.00-1.00PF, active power 0-30000W , electric energy 0-99999kWh and frequency 45.0- 65.0Hz, 6 data display on one screen at the same time. Auto save and reset function1. When the power is cut off, the electric energy value will be automatically saved. this power meter will read the value after the next power-up and continue to add to the number of stored values. 2. The energy reset button is on the bottom right of the meter, you can press the button with a needle for 4 seconds, then the electric energy will be reset. Wide range of ApplicationsThis multi-function volt-ampere wattmeter monitor is easy to install in a panel. Widely used in power metering system, school, market, home appliance, industry, laboratory, etc. Safe and High AccuracyThis single phase digital electric meter is made up of Made of high quality flame retardant ABS material and high precision chip, which makes it safe to use with high precision. * Attention : The digital energy meter can only be used to measure 50/60 Hz alternating current in the city. It will be destroyed if used to measure square wave, inverter output or non-standard sine wave.