The Electronic Specialties 400 Amp DC/AC Auto-Ranging Clamp Meter is designed to measure a variety of currents and applications up to 400 amps, such as fuel pumps, electric motors, alternators, starters, lamps circuits and more. This meter will measure as low as 10 milliamps or as high as 400 amps. It also features a full function, auto-ranging digital multimeter built-in that measures AC or DC volts, resistance, continuity, frequency, duty cycle, capacitance and diodes.