Klein Tools CL210 is an automatically ranging digital-clamp meter that measures AC current via the clamp, AC/DC voltage, resistance and continuity via test-leads, and temperature via a thermocouple probe. Exclusively designed from the ground up by electricians for electricians. Years of field research, combined with extensive input from electricians across America, inspired the development of meters loaded with innovative, time-saving features. Clamp measures AC current. Test leads measure AC/DC voltage, resistance and continuity. Thermocouple probe measures temperature. Safety rating is CAT III 600V, Class 2, Double insulation. Meets requirements for use in basic and controlled electromagnetic environments like residential, office and light-industrial locations. Built to withstand a 3.3 ft. (1m) drop. Includes low battery indicator and has an easily accessible battery compartment. Operating temp: 32°F to 122°F (0°C to 50°C). Operating altitude to 6,562 ft (2,000 m).