This instrument adopts low-loss high-ratio of inductance energy storage DC voltageconverter to change 12V into DC 250V/500V/1000V. It uses digital LCR Bridge forresistance measurement and the insulation resistance test. It has many advantages:lightweight, wide measuring range, backlight display, test lock, auto power off andother functions. It can also be used for electricity measurement with advancedappearance 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 + GreenMaterial: ABSOutput 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 MAccuracy: (4% reading + 2 digits)Short-circuit Current: <1.6mAMedian Resistance: 250V/500V: 2M; 1000V: 5MTerminal Position: L & EVoltage Test: AC750V; Accuracy: (1% reading + 6 digits)Input Impedance: 1MFrequency Response: (50~200) HzTerminal Position: ACV & GDisplay: 90 * 48mm LCD with BacklightMax. Display: "1999"Over Range Display: "1"Measurement Method: A / D ConversionSampling Rate: 3 times/secondOperating Temperature: 0~40COperating Humidity: 30%~85%RHPower Supply: 8 * 1.5V LR6 Batteries(NOT Included); or DC 12V Power Adapter(NOT Included)Product Size: 170 * 120 * 60mm / 6.7 * 4.7 * 2.36inProduct Weight: 528g / 18.65ozPackage Size: 20 * 16.5 * 7cm / 7.87 * 6.5 * 2.76inPackage Weight: 730g / 25.77oz Package List:1 * Insulation Resistance Tester1 * Pair of 10A Test Leads2 * Alligator Clips1 * User Manual(English)