The Dwyer CM-2 True RMS digital clamp meter is a low cost, compact instrument ideal for general electrical testing and troubleshooting. A few applications include HVAC, automotive, electrical/power, and environmental monitoring uses. The Model CM-2 measures DC and AC voltage to 600 V, DC and AC current to 400 A, and resistance to 40 M ohms. The digital clamp meter features data/range hold and auto range buttons to prevent the screen from updating when gathering values, as well as a zero function. The 3-3/4 digit LCD features automatic polarity, overload and low battery indication.