Klein Tools MM300 is a manual ranging multimeter that measures AC/DC voltage, DC current and resistance. It can also test batteries, diodes and continuity. Klein Tools Test and Measurement product line was 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 and electrical testers loaded with innovative, time-saving features. Tests batteries, diodes and continuity Built to withstand a 3.3 ft (1 m) drop and withstand daily wear and tear on the job site Low battery indicator and easily accessible battery compartment