The Triplett Model MG600 High Voltage Insulation Tester tests Insulation Resistance to 60GΩ using four test voltages (500V, 1000V, 2500V, and 5000V), and also measures AC/DC Voltage with Relative Mode, Peak Hold and Min/Max, plus Low Resistance and Continuity. Additional features include Polarization Index (PI), Dielectric Absorption Rate (DAR), Backlit 6000 count display with bargraph, Timed Test function (1 to 15 minutes in 1 minute increments), a Lock Power function for hands-free operation, Data Hold to "freeze" the reading on the display, Auto power off, plus built-in battery check and live ciruit voltage Indicatior. CAT IV 600V safety category. Includes heavy duty test leads, (8) C batteries, 120V AC adapter, and hard carrying case. 1-year warranty.