SPECIFICATION:Used for AC single phase active energy measuring. Wall-mounted installation type, ... record accumulated total active energy.Display range: 5+1, 6+1Accuracy active energy measuring, no need ... 11 standardAccording to IEC62053-21 standardFUNCTIONS:Total energy= positive active+negative active Indicate of ... 60HzStarting current: 0.004IbConnection type choice: single phase two wires, L, L, N, NL, ...