Feature: 1. The digital insulation resistance tester is made of high quality ABS material, durable, and has accurate measurement results. 2. With LCD display, the measurement range can arrive 1999MΩ, and the sampling rate can arrive 2.3 times/sec. 3. The whole machine is beautiful and high grade, with stable performance, compact structure, easy to carry, and can be measured at any time. 4. This resistance meter is suitable for maintenance, test and inspection of various electrical equipment. Is your ideal electrical and electronic tester. 5. This product is suitable for measuring the insulation resistance of various insulating materials and electrical equipment such as motors, cables, switches, electrical appliances, etc. Specification: Item Type: Resistance Tester Model: BM500A Material: ABS Power Supply: 1 x 6F22 9V (Battery Not Included) Application: Electricity numerical test Automatic Range: Overload display "1" Display Mode: LCD display Maximum Display: 1999 Sampling Rate: 2.5 times/sec Working Environment: 0°C-40°C, less than 75%RH Storage Environment: -10°C-60°C, less than 80%RH Rated Voltage 250V/500V/1000V Open Circuit Voltage 90%~110% of rated voltage Measuring Range 0.001~1999MΩ Minimum Resolution 0.001MΩ Accuracy 250V: About 500kΩ 500V: About 1.5MΩ 1000V: About 5MΩ Measure the achievable resistance value to maintain the lower limit of the rated voltage Not less than 1.5mA . Package List: 1 x Tester (Battery Not Included)2 x Clip1 x Test Lead1 x Manual Note: If the back cover of the meter is not in place, it is strictly forbidden to use it. Otherwise, it may cause electric shock.