The EXTECH 380260 digital megohmmeter with auto-ranging enables the measurement of insulation resistance up to 2000 MΩ. The test voltage is selectable between 250, 500 or 1000 VDC. The large, backlit dual display shows both the test voltage output and the insulation resistance. Other functions include low resistance measurement, continuity tests and the measurement of AC and DC voltages. Additional features include automatic discharge at the end of a test, a protective holster with stand, a power lock and a data storage device. The delivery includes test leads, a carrying case and six AA batteries.