... insulation resistance tester 1.Resolution: 1M, With 750V test. 2.Rated voltage:500V/1000V/2500V. 3.New design! NEW ~~~HDT20B NEW digital insulation ... all kinds of electron equipment and insulation material, such astransformer,generator,cable,switch,electric equipment and so ... .5mALow Power DisplayAC Voltage Test: 750V(40-70Hz) Insulation Resistance: ≥500MW(1000V) Withstand Voltage: AC2KV50Hz 1min Work ...