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; includes one (1) test lead set, two (2) AA batteries, and manual; covered by 5 year warranty. Nothing but HEAVY DUTY.