Product Description Measures the rotational speed with a visible red light beam from a powerful LED. It is a great tool to measure the RPM of motors and machine parts. In wood and metal working it can be used to accurately measure the speed of a lathe or milling machine. Can be used for HVAC applications in measuring fan speed. Detection distance up to 6 feet. Highly accurate, digital laser photo tachometer. To take the measurement, apply a reflective mark (included in package) onto the target object, aim the laser beam at the mark, the RPM displays on the LCD screen. Powered by 1 x 9V Battery (not included). Size : 180 x 72 x 37 mm(7.0 x 2.8 x 1.5 inch).
