This professional digital insulation tester has stable performance and reliable result. It adopts the DC Voltage converter of low consumption and high converter ratio inductance energy storage, to change the 9V Voltage to 100V/250V/500V/1000V DCvoltage. Large LCD display with switchable backlight, easy to read.Features:Large LCD 2000 counts display with switchable backlight, easy to read.Test voltage for your choice: 100V / 250V / 500V / 1000V.Reliable insulation resistance tester with stable performance.Locking function of TEST button, wide measurement range, convenient to use.Perfect overload protection, widely used for insulation resistance check, such as electric, cable, electrical and mechanical equipment, telecommunication equipment and electrical facilities.Powered by DC 12V or 6 batteries(not included), with low battery indication and 750V AC voltage test.Specifications:Brand Name: KKmoonColor: Black + OrangeMaterial: PlasticDisplay: LCD Display with Backlight, 1999 (3 1/2digit)Range Control: Manual RangeLCD Size: 90 * 38mm / 3.5 * 1.5"Output Voltage: DC 100V / 250V / 500V / 1000VOutput Current: 250V(R=250k)2mA, 500V(R=500k)2mA, 1000V(R=1M)2mAInsulation Resistance() Range:250V: 0.1M20M, 20M500M (4%+2digits)500V: 0.1M50M, 50M1000M (4%+2digits)1000V: 0.1M100M, 100M2000M (4%+2digits)Short Circuit Current: 2mAMedian Resistance: 2MTerminal Position: L, E, ACV, G(750V)AC Voltage(V): 1V-750V (1.0%+6digits)Low Battery Indication: YESLED Backlight: YESHigh Voltage Indication: YESPower Supply: 6 * 1.5V AA Battery (Not Included) or DC 12V Power Adapter(NOT Included)Working Temperature/Humidity: 040, 3085%RHStorage Temperature/Humidity: 050, 3085%RHItem Size: Approx. 170 * 125 * 60mm / 6.7 * 4.9 * 2.4inItem Weight: 541g / 19.1ozPackage Size: 21.5 * 18 * 8cm / 8.5 * 7.1 * 3.1inPackage Weight: 844g / 29.8ozPackage List:1 * Digital Insulation Tester1 * Pair of 10A Test Leads2 * Alligator Clips1 * Storage Bag1 * User Manual (English)