1.Measure three phase active electric energy, Do not need calibrate for long term operation 2.Lcd display 3. ... 2.0Function and features: 1,Two-way power measure and electricity stealing proof,high accuracy, high reliability, ... overload, low power consumption, light weight etc 2,Measure three phase active electric energy, Do not need ... 2 Three phase three wire electronic digital multi tariff kWh Meter,