energy meter be used in TRMS measuring single-phase,voltage,current,power power factor,frequency,watthour,reactive power etc D2011 single-phase multifunctional energy meter YOTO ... sellMain introduction:Technical parameters Power AC220V±10% 50/60HzMeasuring itemTRMS,single-phase,voltage,current,power,power factor,frequency,watthour,reactive power etcDirect ...