Heavy duty True-RMS electrical current tester for professional residential, commercial and industrial applications. The perfect tool for the professional electrician includes all the features that are needed to get the job done in the field, on-site or in the plant. Milwaukee® clamp Meter features - jaw size of 1 in. Measuring up to 350 kcmil cable rated CAT III 600 V current measurement to 400 A AC voltage measurement to 600 VAC/VDC LED work light to improve task lighting resistance measurement to 4000 Ohm test for continuity black on white display and backlight for easier reading rugged over-molding for increased durability and user grip includes one (1) electrical test lead set, two (2) AAA batteries and manual covered by 5 year warranty. Nothing but Heavy duty. Milwaukee® Clamp Meter, Heavy Duty Digital, 600 VAC/VDC, 400 A Electrical Rating, 4000 Ohm Resistance, 1 in Jaw, 4000 Count, Backlit LCD Display, True RMS AC Response, Safety Rating: CAT III 600 VAC, AAA Alkaline Battery Power Source, 7 in L, Polycarbonate, Black/Red