The REED R5600 is a combination insulation tester (megohmmeter) and multimeter that tests insulation resistance at 250V, 500V, and 1000V test voltages, reading up to roughly 2000 megohms, and also handles general resistance and voltage measurements. It has a backlit dual LCD display, an audible continuity check, a data-hold function, and a lock feature with hanging strap for hands-free field use, all housed in a rugged double-molded case rated CAT III 1000V. It ships with test leads, alligator clips, a hard carrying case, and runs on 6 AA batteries. This listing is the NIST-certified version, including a traceable calibration certificate.