This is a multifunction instrument that can measure insulation resistance, DAR and PI index, DC voltage and AC voltage. 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: Insulation Resistance Tester -- This instrument applies automatic voltage release function, with high stability and reliability, features maximum 2000 counts, 100 groups of data storage, and 0.1M-10G insulation resistance measuring range. AC/ DC Voltage Measuring -- Rated output voltage is variable, easy to switch between 50V/ 100V/ 250V/ 500V/ 1000V through the up/ down button. It can measure AC and DC voltage with the range of 10-600V. Battery operated, with large digital LCD backlit display, easy to read. Solve Practical Problems -- It is suitable for measuring the insulation resistance of various electrical equipments and insulating materials such as transformers, motors, cables, switches, electrical appliances, etc. It is suitable for maintenance, repair, test and etc.. More Accurate Results -- Insulator is sensitive to temperature and humidity changes, and interference current when you start measuring will also affect the results. DAR and PI measuring can eliminate these effects and to identify the quality and aging condition of the insulator. Safe Operation, Portability -- High voltage indication to remind you of safe operation; low battery indication to remind you of replacing batteries in time. The instrument has fashionable appearance and stable performance. Dustproof and moisture-proof construction fits for outdoor use. Comes with a zipper storage bag for easy storage and portability. Note: 1. Please read the user manual carefully before use. 2. Size and color may be slightly different due to manual measurement and different light conditions. Thanks for understanding. Specifications: Color: Red + Grey Material: ABS + Silicone Screen: LCD Backlit Screen Maximum Count: 2000 Output Voltage: 50V/ 100V/ 250V/ 500V/ 1000V Resistance Measuring Range: 0.1M~10G AC/ DC Voltage Measuring Range: 10V-600V AC Voltage Frequency: 40-70Hz Data Storage: 100 Groups Short-circuit Current: 1.8mA Power Supply: 8 * 1.5V AA/ LR6 Battery (Not included) Work Environment: 0~35, 75%RH, 2000m Storage Environment: -10~50, 75%RH Item Size: 180 * 140 * 70mm / 7.09 * 5.51 * 2.76in Item Weight (without battery): 623g / 1.37lbs Package Size: 20 * 18 * 7.5cm / 7.87 * 7.09 * 2.95in Package Weight: 941g / 2.08lbs Package List: 1 * Insulation Resistance Tester 2 * Test Pen 2 * Alligator Clip 1 * Storage Bag 1 * User Manual