".-Compatible for 1 phase 2 wire, 3 phase 3 wire, 3 phase 4 wire systems -11 to 300V (L-N), 19 to 519V (L-L) measurement -Max/Min power Demand measurement, Import/Export Energy measurement -%THD upto 31st level, RS485 Communication MODBUS RTU -Accuracy Class 0.5S & Class 1 -CE RoHS, UL & MID certified"