Product Description CLAMP METER 400 AMP. The product is easy to use. The product is durable. The product is manufactured in Taiwan. From the Manufacturer 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 2235-20 Clamp Meter features: jaw size of 1.0-inch measuring up to 350 MCM cable; rated CAT III 600V; current measurement to 400 amps AC; voltage measurement to 600 volts AC/DC; LED Work Light to improve task lighting; resistance measurement to 4000 ohms; 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.