Precision4-wire, 3-wire, simple 2-wire measurementmethod to measure earth resistance, soil resistivity, earth voltage. 1. Model No. : ETCR3000B 2. 2/3/4-wire method measure earth resistance,Range:0.00Ω~30.00kΩ; 3. Soil resistivity measurement, Range:0.00Ωm~9000kΩm; 4. Earth voltage measurement,Range:AC 0~600V 5. Data storage: 300 sets 6. Power Supply : DC 9V (Alkaline dry battery LR14 1.5V 6 PCS )