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. Features: Wide measuring range: up to 2000M 1000V with accuracy of (4% of reading+2 digits). Large LCD display(90 * 48mm), with backlight, max. display "1999". Data hold and auto power off function. Over range indication: display "1". Low power consumption: less than 300mW at no-load measurement. Applied in insulation resistance testing of motors, cables, electrical equipment, telecommunication equipment, etc. Specifications: Color: Dark Grey + Green Material: ABS Output Voltage: DC250V/500V/1000V, 10% Insulation Range: 250V: 0.1M~20 M/20M~500 M; 500V: 0.1MM~50 MM/50MM~1000 MM; 1000V: 0.1MM~100 MM/100MM~2000 MM Accuracy: (4% reading + 2 digits) Package List: 1 * Insulation Resistance Tester 1 * Pair of 10A Test Leads 2 * Alligator Clips 1 * User Manual(English)