... .Specification: 1. Rated Voltage: 100V ,220V, 230V, 240V, 380V2. Reference frequency: 50Hz or 60Hz3. Wire code: 2 wire, 3 wire, 4 ... , LCD digital display type meter(3) Prepaid meter(4) Active meter, reactive meter(5) Electronic meter, mechanical meter(6) Modular DIN Rail type meter, Round meter7. May ...