The Milwaukee Digital Multimeter (NIST) is a Heavy duty True-RMS meter for professional residential, commercial and industrial applications. The perfect tool for the professional commercial or industrial electrician; includes the features that are needed to get the job done in the field, on-site or in the plant. Milwaukee 2216-20 Digital Multimeter features: True RMS measurement to accurately measure all applications; CATIII 600V for increased safety in demanding electrical environments; AC voltage range of 6 millivolts to 600 volts; DC voltage range of 600 millivolts to 600 volts DC; Resistance measurement from 600 ohms to 40 Mohm; frequency measurement from 10Hz to 50 kilohertz; detects continuity at less than 30 ohms; Current measurement to 10amps AC/DC; hold function, min/max function and digital bar graph readout; black on white display and backlight for easier reading; rugged over-molding for improved durability and user grip; proprietary rail system for mounting accessories; A NIST Certificate of Calibration with Data is also included, needed by many organizations as proof of calibration with the date when NIST Calibration was performed. Includes one (1) test lead set, two (2) AA batteries, and manual; covered by 5 year warranty. Nothing but HEAVY DUTY.