Earth resistance measurement, loop resistance measurement,grounding down leads leakage current measurement, judge ground fault. 1. Model : ETCR2000C 2. Resistance Range : 0.010Ω-1000Ω 3. Data Memory : 99Groups 4. LCD Screen : 4 Digits LCD display 5. Protection Class : Double insulation 6. Power Supply : DC: 6V ( 4 PCS of LR6 Alkaline batteries)