... 1.CCC CE approved 2.AC input and AC output 3.low price with high quality Output Mode ... Ω(each phase)Frequency45-65HZ(Available in 30%—120% of voltage scope)MeasuringaccuracyVoltage,current±(0.5%FS+digital)Frequency±0.1HZSourceScopeAC ... 220V±10%,0/60HZConsumption<5VASafetyWithstand voltage>2KV 50HZ/1minInsulating resistanceAny two of input,output ,source,dasing ...