... modbus protocol. DW series True Value Display (RMS) Power Meter,Energy Meter Features: 1) True effective measure: voltage, current, active power, reactive power, power factor, frequency, Kwh, etc. ... output for voltage, current, power factor, active power, reactive power etc., select freely.5) Transformed analog output 4-20mA for voltage, current, active power, reactive power, frequency power factor ...