Measures up to 400 amps AC, Large 1.0” jaw opening. Wide Voltage range to 600 AC/DC volts. Built-In LED Work Light. Black on White Display with Backlight for easier reading. Thin Jaw Profile for easier wire measurement in panels or in bundles. True-RMS for accurate measurement in all applications. CAT III 600V for increased safety. Rugged over-molding increases durability and user grip.