Multifunction Digital voltmeter ammeter wattmeter let you clearly see the situation of electricity use. For testing current, voltage, power factor, active power, apparent power. The measurement resolution can change automatically. The testing accuracy is 1%, 2 digits. Display the AC voltage and current by 4-digit red LED; Display the active power, power factor, apparent power by 5-digit red LED. Specification: Voltage Range: AC 80-300V(Single Phase) 200-450V (Three Phase) Current Range: AC 0-100A Active Power Range: 0-30000W Apparent Power Range: 0-3000VA Power Factor Range: 1.000-0.000 Measurement speed: about 2 times per second. Size: approx. 80x64mm/3.15x2.52inch. Application Method: With English manual, easy to use Package Includes: 1 Piece AC Voltmeter Ammeter Wattmeter Note: This meter is only suitable for pure ac 50-60hz mains power supply, not used for square wave, inverter output and sinusoidal wave circuit measurement, otherwise the meter will be permanently damaged!