This is a multifunction instrument that can measure insulation resistance, DC voltage, AC voltage and continuity. It has fashionable appearance and stable performance, can be used for measuring electrical machinery, cable, electromechanical equipment, telecom equipment, electric power facilities and other insulation resistance. Features: This instrument applies DC voltage converter with low loss, high variation ratio, and inductive energy storage, which can convert 9V voltage to 250V/ 500V/ 1000V DC voltage. It applies digital electric bridge to measure insulation resistance, and can measure AC and DC voltage as well. It has functional characteristics of portability, wide measuring range, backlight display, and data holding. When using straps, the operator can operate the instrument with both hands, which is more humanized. The instrument has fashionable appearance and stable performance. With large LCD digital display, easy to read. With low battery indication, over-limit alarm, high-voltage alarm, safer and more convenient to use. Suitable for measuring electrical machinery, cable, electromechanical equipment, telecom equipment, electric power facilities and other insulation resistance. Comes with a protective lid for protecting the insulation resistance tester. Comes with a cloth bag for easy storage and carrying. Specifications: Color: Black & Red Material: Plastic Output Voltage: 250V/ 500V/ 1000V Test Current: 1mA Insulation Resistance: 1M~2000M Short-circuit Current: 1.8mA Median Resistance: 250V/ 500V: 100M; 1000V: 1000M Resistance, Continuity Test: 0~2K, 50 buzzer will make a sound, Test Current: 1mA DC Voltage Measurement: 0~1000V AC Voltage Measurement: 0~750V Jack Position: Insulation Resistance: E and L; Voltage, Resistance: V/ and G Power Supply: 6 * 1.5V AA Battery (Not included) or External DC 9V Item Size (without Lid): 175 * 115 * 55mm / 6.89 * 4.53 * 2.17in Item Weight (without Lid): 411g / 14.49oz Storage Bag Size: 18.5 * 17.5 * 9cm / 7.28 * 6.89 * 3.54in Package Size: 20.5 * 17.5 * 9.5cm / 8.07 * 6.89 * 3.54in Package Weight: 900g / 1.98lbs Package List: 1 * Insulation Resistance Tester 2 * Test Pen 2 * Alligator Clip 1 * Strap 1 * Storage Bag 1 * User Manual (English)