Power Source: 8 AA Batteries (Not Included)Test Voltage: (Ohmic Voltage Range) - 1 mA = | = 1,3 mA (High Ohmic Voltage Range) - DC 10v, 100v, 500v Ohmic Test Range (Low): 1 - 10 kOhm; (High): 1 kOhm - 199 GOhm