The Extech MG320 Insulation Tester / True RMS MultiMeter combines a 20GΩ/1000V high range Insulation Tester with a full-featured True RMS MultiMeter in a single, compact instrument. Insulation tester includes PI/DAR modes, programmable timer, and a comparator for custom test configurations and quick results. CAT IV-600V safety rating ensures the highest level of protection. The multimeter functions include AC/DC Voltage, Resistance, and Continuity Test. Manually store/recall up to 99 readings. Designed with rugged housing and large backlit 6,000 count LCD display with analog bar graph. Complete with test leads, alligator clip, 6 x AA batteries, and soft case.