... volts,amps, active power,reactive power,power factor,Hz, kWh,kvarh,harmonic,RS485/Modbus, CE certify PMAC720 Multifunction Power Meter detailed description:Harmonic Power Analyser: Outstanding flexibility ... * Power supply: 85~265VAC, or 80~300VDC*Programmable CT (1 ~ 49,999), PT (1~999,999)*Up to 31st harmonic analysis ... an extend module)*CE certification, IEC61000 PMAC720 RS485 modbus power meter