With the Extech 380396 you can measure insulation resistance up to 60 GΩ at test voltages of 500 V, 1000 V, 2500 V and 5000 V. It offers various measurements, including polarization index (PI), dielectric absorption ratio (DAR) and AC/DC voltages up to 600 V with a min/max function. It also has peak and relative functions and a timer function from 1 to 15 minutes for IR measurements. The delivery includes test leads, eight C batteries, a 220 V AC adapter, a robust carrying case and a user manual.