Features:High Voltage Indication: √3 1/2 digital display， with a max. reading of 1999An accurate， reliable and easy-to-use insulation testerLarge LCD display， easy to readLCD Backlight: √Low Battery Indication: √Basic Function:Test Voltage: 250V/500V/1000VResistance Range: 0.1MΩ—1999MΩMin Resolution: 1 MΩAccuracy: ±10%Short-Circuit Current: >1.0mAAC Voltage: 1-750VOutput Load: ≥1000MΩ(90%~110%)Insulation Resistance: ≥500 MΩWithstand Voltage: AC 2KV 50Hz 1min Specifications:Insulation Resistance(Ω): Test Voltage:250V/500V/1000VOutput Current: 250V(R=250kΩ) 1mA; 500V(R=500kΩ) 1mA; 1000V(R=1MΩ) 1mA200MΩ 250V: 0.1-20MΩ; 500V:0.1-50MΩ; 1000V: 0.1-100MΩ ±4%2000MΩ 250V: 20-500MΩ; 500V:50-1000MΩ; 1000V: 100-2000MΩ ±4%Short Circuit Current: ≤1.8mAAC Voltage: 750V ±1%+6General Characteristic:Power: 6 * 1.5V AA Batteries (not included)LCD Size: 55 * 35mm Product Net Weight: 500g Product Size: 175 * 115 * 55mm Product Color: GreyPackage Size: 18.5 * 16 * 7cm / 7.4 * 6.3 * 2.1inPackage Weight: 653g / 1.4lbPackage List:1 * HD HDT20A Insulation Rseistance Tester1 * Pair Test Lead1 * Pair Alligator Clip1 * English Manual