The Matco Tools Tech Multimeter MD257 is a handheld digital multimeter designed for various test and measurement functions. With a DC voltage range of .01mV-1000V and an AC voltage range of the same, this multimeter can measure resistance up to 60 M Ohms and frequency up to 1000 Hz. It features a continuity test, diode test, and protection against dust. The unit also includes input protection features like an HRC fuse, auto-ranging, and auto power off for added convenience and safety. With a measurement category of CAT III, this multimeter is suitable for industrial and professional use.