Megger 212159 Analog Hand-Crank Insulation Tester, 2,000 Megaohms Resistance, 100, 250, 500, 1000 V Test Voltage Insulation tester for measuring insulation resistance and voltage Average-sensing meter provides accurate readings when measuring linear loads, where the current or voltage has a sinusoidal waveform Analog meter with manual range selection for flexibility of use Guard terminal to eliminate surface current leakage Safety rated to European Standard EN61010-1 Category II, 300V and Category I, 600V