This megohmmeter features a true insulation resistance tester with adjustable test voltages of 250V, 500V, and 1000V, capable of measuring up to 40 GΩ. It includes a 1 kV insulation and continuity testing function, a true RMS AC/DC voltmeter up to 700V, and a timer with a maximum test duration of 40 minutes. Additional features include a hands-free test lock for measurements up to 15 minutes, auto discharge after testing, a hold function for freezing readings, and a large dual display with backlight. The device has an auto standby feature to conserve battery life and complies with international standards including IEC/EN 61557. Suitable for testing insulation on cables, electronic components, and circuits, especially in aerospace, defense, and industrial environments, with a CAT IV safety rating at 600V.