Insulation series digital tester which adopts low loss high ratio of inductance energy storage DC voltage converter can change 12V voltage into 250V / 500V / 1000V DC voltage. It can be applied in motors, cables, mechanical and electrical equipment, telecommunications equipment, power facilities and other insulation resistance testing areas. Features: Insulation series digital tester which adopts low loss high ratio of inductance energy storage DC voltage converter can change 12V voltage into 250V / 500V / 1000V DC voltage. Power Supply: AA battery LR6 (1.5V) x 8 (not included). It contains lack of voltage indication when the voltage is not enough. It uses digital LCR Bridge for resistance measurement and the insulation resistance test. It has many advantages such as light, wide measuring range, backlight display, test lock, auto power off and other functions. It can also be used for electricity measurement with great advanced appearance, stable performance. Based on straps design, you can operate with both hands. It can be applied in motors, cables, mechanical and electrical equipment, telecommunications equipment, power facilities and other insulation resistance testing areas. Specifications: Color: Red / Green (Optional) Material: ABS With Automatic Shutdown Function: It will automatically shut down after 15 minutes of inactivity Display: 90 x 48mm LCD display, the maximum display is "1999". Over Range Indication: Only the highest digit shows "1" when the upper limit is exceeded. Measurement Method: Double integral type A / D conversion. Sampling Rate: About 3 times /second. Power Consumption: Power consumption of empty load test