The TRIPLETT Model MG500-NIST Insulation Tester with Certificate of Traceability to N.I.S.T. tests Insulation Resistance to 200GΩ using fi-Volte test -Voltoltages (50-Volt, 100-Volt, 250-Volt, 500-Volt and 1000-Volt), and also measures AC/DC -Voltoltage, Resistance, Capacitance, Frequency, and Continuity. Additional features include Polarization Index ((PI), Dielectric Absorption Rate (DAR), Backlit 6000 count display with bargraph, Timed Test function (1 to 10 minutes in 1 minute increments), Comparison Mode (pass/fail), a Lock Power function for hands-free operation, Data Hold to "freeze" the reading on the display, Auto power off, li-Volte circuit -Voltoltage Indicator, plus store/recall 99 measurement groups. CAT I-Volt 600-Volt safety category. Includes test leads, test probes, remote control probe, alligator clips, (6) AA batteries, carrying case and Certificate of Traceability to N.I.S.T. 1-year warranty. ETL listed.