Features: Insulation Resistance Tester: this instrument applies automatic voltage release function, with high stability and reliability, features maximum 2000 counts, 100 groups of data storage, and 1MΩ-200GΩ insulation resistance measuring range. AC or DC Voltage Measuring: rated output voltage is variable, easy to switch between 250V or 500V or 1000V or 2000V or 2500V through the up or down button. It can measure AC and DC voltage with the range of 10V-600V. Battery operated, with large digital LCD backlit display, easy to read. Solve Practical Problems: it is suitable for measuring the insulation resistance of various electrical equipment and insulating materials such as transformers, motors, cables, switches, electrical appliances, etc. It is suitable for maintenance, repair, test and etc.. Safe Operation, Portability: high voltage indication to remind you of safe operation low battery indication to remind you of replacing batteries in time. The instrument has fashionable appearance and stable performance. Dustproof and moisture-proof construction fits for outdoor use. Comes with a zipper storage bag for easy storage and portability. Data Hold and Data Storage: with data hold function for conveniently data checking, and it can store up to 100 set of the measured insulation resistance value, the data browse and delete also can be operated easily. Large LCD Screen and Easy to Control: soft push buttons is easy to operate, the large LCD display screen with bright backlight, convenient to check the measured data at a glance even in the dark environment. Silicone Protective Case: protected with a soft silicone cover, you can use the meter at various condition without worrying it from falling down or scratch by hardware. Specifications: Output Voltage: 250V or 500V or 1000V or 2000V or 2500V Measurement Range: 250V: 1MΩ-10GΩ 500V or 1000V: 2MΩ-20GΩ 2000V or 2500V: 5MΩ-40GΩ AC Voltage: 10V-600V DC Voltage: 10V-600V Resistance: 1MΩ-200GΩ Absorption Ratio: Yes Polarization Index: Yes Automatic Discharge: Yes Test Voltage Display: Yes High Voltage Indication: Yes Measurement Time Display: Yes Material: ABS Max. Display: 2000 counts Data Storage: 100 sets Range: Auto range Operating Altitude: 2000m Operating Temperature: 0-35°C Storage Temperature: -10-50℃ Storage Humidity: