This Professional Clamp Meter has multi-functions including measurements of AC/DC voltage and current, resistance, capacitance, frequency, duty cycle, diode and continuity test. It can be clamped around an electrical conductor to measure frequency, AC/DC current and duty cycle without any physical contact. With LCD backlight, clamp light, analog bar, relative value measuring, auto range function, maximum/minimum value measuring, this clamp meter is an ideal multi-function instrument for use in the fields, workshop, school and home applications.