The Megger MFT1720 Multifunction Electrical Installation Tester is a handheld device designed for measuring various electrical parameters such as resistance, RCD, phase rotation, continuity, PFC, AC voltage, and EFLI. With a CAT IV measurement category and IP54 rating, this tester offers reliable and accurate readings. Features like auto power off, backlight, and battery door access make it convenient for use in different testing situations. Manufactured in the United Kingdom, this digital tester with a Megohmmeter resistance range is a valuable tool for electrical professionals and enthusiasts. Owned for 8 years and been calibrated every year on the same month every time. Will put all calibration certificates in with meter and extra test leads.