Check the listing for details. Electronic Specialties 550 - EV and Hybrid Insulation Tester. Condition: New. Listed at 235.97 USD. This unit checks high voltage circuits on EV?s and Hybrids for leaks to ground. It can supply 250V, 500V and 1000V test voltages for doing complete insulation testing. You can not easily test for high volt leakage without a high volt test source. The 550 is auto-ranging and can measure up to 2000 MegaOhm with a resolution of 1 K Ohm.Other test functions include AC/DC Volts, Ohms and ContinuityCATIII 1000 Volt safety ratedLarge dual display with white LED backlightingTest Hold function for easy operationOver Range indicationLow battery indicationVoltage AC: 0-750VVoltage DC: 0-1000VResistance: 0-200, 2000Insulation Resistance: 200M, 2000MTest Voltage: 250V-200MegOhm, 500V-200MegOhm, 1000V-2000MegOhmContinuity Test: Audible Beep