digital single phase AC voltmeter 1.CCC CE approved 2.AC input and AC output 3.low price with high quality ... valueAC57.7V,100V,220V,380VOverloadConsistent 1.2 times instantaneous 2 times/30 secConsumption<1VA(each phase)Impedance>500kΩCurrentRated ... ,current±(0.5%FS+digital)Frequency±0.1HZSourceScopeAC 220V±10%,0/60HZConsumption<5VASafetyWithstand voltage>2KV 50HZ/1minInsulating ...