1.ISO and CE 2.Measure active energy 3.Adopt dedication meterage chip ADE7755 Static Single-Phase Electric Energy Meter uses advanced special ... frequency of 50Hz, it is highly accurate, reliable, durable, low power consumption, without reversion, creep-proof, anti-tampering, bilateral recording with ... 50/60Hzclass 1.0 or 2.0 Single phase electricity power meter