Features: Test the in sulation resistance with 500V / 1000V / 2500V / 5000V. Automatic calculate PI (polarization index) and continuity test. With backlight display for easy viewing at day or night and auto power off. Support DC and AC voltage test and timing test. High voltage and high precision with a kit of accessory, convenient to measure. Specification: Model: GM3125 Rated Voltage: 500V / 1000V / 2500V / 5000V Measure Range: 500V: 0.0-999M?? 1000V: 0.0-1.99G?? 2500V: 0.0-99.9G?? 5000V: 0.0-1000G?? Accuracy: ??5%rdg, ??5%rgt DC/AC Measure: 30-600V Resolution: 1.0V Overload Protection: AC 1200V / 10seconds Withstand Voltage: AC83320V / 5seconds Insulation Resistance: 1000M?? / DC1000V Short Circuit Current: 1.4mA Operation Voltage: 12V Battery: 4 * 1.5V LR14 Battery (NOT included) Size: Approx. 153*96*220mm/6*3.8*8.7inch Weight: Approx. 2740g / 96.7oz Package List: 1 x Insulation Tester 1 x Green Test Wire 1 x Black Test Wire 2 x Large Crocodile Clip 1 x Screwdriver 1 x Red High Voltage Bar 1 x Black Bag 1 x Accessory Bag