Earth resistance measurement, loop resistance measurement, grounding down leads leakage currentmeasurement, judge groundfault. 1. Model No.: ETCR2000C+ 2. Resistance Measure Range: 0.010Ω~1200Ω 3. Leakage Current Measure Range: 0.00mA~20.0A 4. Alarm Threshold Setting: 1-199Ω 5. Alarm Function: audible and visible alarm 6. Power Supply : 6VDC ( 4 PCS of No.5 LR6 Alkaline dry batteries)