... factor/Kwh,etc 2) 4-20mA analog output 3) 2 alarm, RS485 Coulometer, ampere & voltage ... Power Meter with follow features:1) 3 lines 4 digit LED display, easy to read;2) To ... measure voltage, current, power factor, active power, reactive power, apparent power, HZ, KWH;3) With up ... to 2 relay alarm output, alarm value set freely;4) For AC signal, display true ...