... ADE7755 Static Single-Phase Electric Energy Meter uses advanced special recording integrated circuit with high precision elements. Mainly used in AC single-phase watt-hour ... with its recording frequency of 50Hz, it is highly accurate, reliable, durable, low power consumption, ... 220V,230Vfrequency 50/60Hzclass 1.0 or 2.0 Single phase electronic counter kWh meter