This instrument adopts low-loss high-ratio of inductance energy storage DC voltage converter to change 12V into DC 250V/500V/1000V. It uses digital LCR Bridge for resistance measurement and the insulation resistance test. It has many advantages: lightweight, wide measuring range, backlight display, test lock, auto power off and other functions. It can also be used for electricity measurement with advanced appearance and stable performance. Specifications: Color: Dark Grey #43; Green Material: ABS Output Voltage: DC250V/500V/1000V, 10% Insulation Range: 250V: 0.1M~20 M/20M~500 M; 500V: 0.1M~50 M/50M~1000 M; 1000V: 0.1M~100 M/100M~2000 M Accuracy: (4% reading #43; 2 digits) Short-circuit Current: lt;1.6mA Median Resistance: 250V/500V: 2M; 1000V: 5M Terminal Position: L E Voltage Test: AC750V; Accuracy: (1% reading #43; 6 digits) Input Impedance: 1M Frequency Response: (50~200) Hz Terminal Position: ACV G Display: 90 * 48mm LCD with Backlight Max. Display: #34;1999 #34; Over Range Display: #34;1 #34; Measurement Method: A / D Conversion Sampling Rate: 3 times/second Operating Temperature: 0~40C Operating Humidity: 30%~85%RH Power Supply: 8 * 1.5V LR6 Batteries(NOT Included); or DC 12V Power Adapter(NOT Included) Product Size: 170 * 120 * 60mm / 6.7 * 4.7 * 2.36in Product Weight: 528g / 18.65oz Package Size: 20 * 16.5 * 7cm / 7.87 * 6.5 * 2.76in Package Weight: 730g / 25.77oz Package List: 1 * Insulation Resistance Tester 1 * Pair of 10A Test Leads 2 * Alligator Clips 1 * User Manual(English)