The Extech MG320 Insulation Tester/True RMS Multimeter, CAT IV 20GΩ/1000V combines a portable 20GΩ/1000V Insulation Tester with a True RMS Multimeter. Insulation tester includes PI/DAR modes, programmable timer, and a comparator for custom test configurations and quick results. 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.