Compact Design Digital Frequency Meter, Digital Power Meter,Digital Power Factor Meter, Active Power Meter,Reactive Power Me Technical data: AccuracyDisplay: 0.50.2 class, Frequency meter 0.1 class, Transmitting: 0.5 classDisplay4 digit LED display with sign bitlnputNominal inputCurrent AC1AAC5ADC1ADC5ADC20mA and etcVoltage AC100VAC220VAC380VDC100VDC220VDC380VDC75mV and etc.OverloadingContinuance ...