Features: For measuring insulation resistance, AC voltage, DC voltage, etc. 2.7"(65*25mm) large LCD screen with large digital-readout with backlight for clear reading. Overload indication for safety operation. Automatic measurement and discharge voltage automatically. Red alarm light is on when high voltage outputs. Low battery indicator to remind you to replace battery to ensure measurement accuracy. 10M internal resistance test. Features of high accuracy, stable performance, easy operation and reliability. Professional in electric equipment maintenance, testing and inspection. Red lid to protect the button and screen of the meter. Storage pouch included, smooth zipper closure. Specifications: Material: PP Max. Display: 1999 Insulation Resistance(): Test Voltage: 100V/250V/500V/1000V 0%~10% 100V: 0.00M~100M (3%+5) 250V: 0.00M~99.9M (3%+5) ; 100M~5.5G (5%+5) 500V: 0.00M~99.9M (3%+5) ; 100M~5.5G (5%+5) 1000V: 0.00M~99.9M (3%+5) ; 100M~5.5G (5%+5) Load Current: 50V(R=50K) 1mA 0%~10% ; 100V(R=100K) 1mA 0%~10% ; 250V(R=250K) 1mA 0%~10% 500V(R=500K) 1mA 0%~10% ; 1000V(R=1M) 1mA 0%~10% Short Circuit Current: