Features: Test voltage of 250V/500V/1000V, can be widely used. Made of high quality ABS, durable & long for time service. Large LCD display with backlight, easy to read. Measuring range is 0.1M-1999M, and the range is changed manually. Suitable for measuring the insulation resistance of various electrical equipment and insulating materials such as for transformers, motors, cables, switches, electrical appliances, etc. Specifications: Material: ABS Size: approx 170x130x64mm/6.7x5.1x2.5in Color: Orange/Blue AC voltage:1V- 750V Frequency: 40-70Hz Output voltage: 90%~110% (output load of 1000 M); Short-circuit current: 1.0mA; Battery voltage low indication: The display displays "" Insulation resistance: 500 M (1,000 V) Pressure resistance: AC 2KV 50Hz 1minute Note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Insulation Tester