The Matco Tools Clamp Meter, No. CM600A, is designed to allow accurate current measurements using clamp jaws and has other features found only in full-function multimeters when used with test leads and a temperature probe. The tool is suited for testing starting/charging circuits, provides easy access to current, voltage, and other key automotive measurements. The clamp meter features: 1000A and 400A AC/DC, 600V AC/ DC, duty cycle, resistance, capacitance, diode, continuity, frequency, and temperature.