The Milwaukee True RMS Multimeter is a heavy duty meter for professional residential, commercial and industrial applications. The perfect tool for professional electricians, the 2217-20 offers functionality users expect with features that make doing the job easier. The 2217-20 True RMS Multimeter features a large white on black display for clearer readings, a slide rail system to add proprietary accessories and rugged over-molding for increased durability and grip. The meter is rated to CATIII 600V and meets UL safety specifications required by electrical users.