The Megger MIT420/2 is a CAT IV insulation tester from the MIT400 series, featuring polarisation index (PI) and dielectric absorption ratio (DAR) functions, a variable test voltage range from 10V to 1000V in 10V steps, and result storage. It is suitable for electrical, industrial, and a wide variety of testing applications including cable, motor, automotive, ESD, panel, avionics, and maintenance tasks. The device employs feedback-controlled test voltages to limit overvoltage to 2%, enhancing safety over industry standards. It has a rugged weatherproof housing, a back stand, and a six-cell battery compartment with separate fuse access. Dimensions are 108mm x 228mm x 63mm, weighing 600g, and it operates in temperatures from -10°C to +55°C.