Insulation resistance tester (or high voltage insulation meter) is a special instrument for measuring insulation resistance. It is an ideal test instrument for measuring insulation resistance of large transformers, transformers, generators, high-voltage motors, power capacitors, power cables, arresters, etc.Features:Automatic release voltage function. Suitable for measuring insulation resistance of various electrical equipment and insulating materials such as transformers, motors, cables, switches, electrical appliances, etc. It is suitable for the maintenance, repair, test and verification of various electrical equipment.Rated output voltage variable: The rated output voltage can be switched by the function buttons( 1000V switches between 50V, 100V, 250V, 500V, 1000V)High voltage indication: There is a red LED light in the machine indicating that there is high voltage output in the instrument, there is a danger of electric shock, the operator should pay special attention to safety.Low battery voltage indication. Battery-driven, easier to use. Easy to operate and carry. Strong load capacity, Specifications:Color: RedMaterial: ABSBatteries Model: 8 * AA batteries (not included)Max. display: 2000 countsMeasuring : 0. 1MΩ10GΩItem Size: 172.7 * 140.3 * 62.3 mm / 6.8 * 5.52 * 2.45 inchItem Weight: 621.9g / 21.94ozPackage Size: 200 * 180 * 80 mm / 7.87 * 7.09 * 3.15 inchPackage Weight: 926g / 32.66ozPackage List:1 * Digital Megohmmeter2 * Test Cable2 * Crocodile Clip1 * Storage Bag1 * Manual(English)