Insulation Resistance Tester (or high voltage insulation meter) is a specialized instrument designed for measuring insulation resistance. It is an essential tool for assessing the insulation resistance of large transformers, generators, high-voltage motors, power capacitors, power cables, arresters, and more. Features Automatic Voltage Release: Safely measures insulation resistance across various electrical equipment and materials, including transformers, motors, and cables. Adjustable Output Voltage: Easily switchable rated output voltage settings (1000V switches between 50V, 100V, 250V, 500V, 1000V). High Voltage Indicator: A red LED signifies high voltage output for safe operation. Users must exercise caution to avoid electric shock. Low Battery Indicator: Battery-operated for convenience and portability. Robust Load Capacity: Less than 1.8 mAh output short-circuit current ensures reliable operation against voltage surges and short circuits. Voltage Measurement: Capable of measuring AC/DC voltage between 10V-600V with AC voltage frequency from 40Hz to 70Hz. Durable Design: Dust-proof and moisture-proof construction ideal for outdoor usage. Specifications Color: Red Material: ABS Batteries Required: 8 x AA batteries (not included) Maximum Display: 2000 counts Measuring Range: 0.1MΩ ~ 10GΩ Item Dimensions: 172.7 x 140.3 x 62.3 mm (6.8 x 5.52 x 2.45 inches) Item Weight: 621.9g (21.94oz) Package Dimensions: 200 x 180 x 80 mm (7.87 x 7.09 x 3.15 inches) Package Weight: 926g (32.66oz) Package Includes 1 x Digital Megohmmeter 2 x Test Cable 2 x Crocodile Clip 1 x Storage Bag 1 x English Manual