AC voltage up to 500KV Test voltage have 20V/48V Provide choice. 3 pole & 4 pole earth resistance multimeterMS2308 Advanced Earth ... voltage up to 500KV.Features·Test voltage have 20V/48V Provide choice.·2 pole resistance measurement.·3 pole & 4 pole ... test frequency. Have 94 Hz,105Hz,111Hz,128Hz for frequency provide choice. Automatic frequency control (AFC) is automatically identified interference ...