This Klein Tools MM400 Digital Multimeter is an advanced auto-ranging tool that provides precise measurements of AC/DC voltage, AC/DC current, and resistance. The MM400 DMM goes beyond basic measurements by offering additional features such as temperature measurement, capacitance measurement, frequency measurement, duty-cycle measurement, and the ability to test diodes and continuity. The Test and Measurement product line from Klein Tools is specifically tailored for electricians, developed through a collaborative effort involving years of field research and valuable input from professionals across the United States. This extensive research and feedback have led to the creation of meters and electrical testers equipped with innovative features designed to save time and enhance efficiency.