The Triplett Model MG600 High Voltage Insulation Tester tests Insulation Resistance to 60GΩ using 4 test voltages (500-Volt, 1000-Volt, 2500-Volt and 5000-Volt) and also measures AC/DC Voltage with Relative Mode, Peak Hold and Minimum/Maximum, 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-minut 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 Indicator. CAT IV 600V safety category. Includes heavy-duty test leads, (8) C batteries, 120-Volt AC adapter and hard carrying case. 1-year warranty.