DIGITAL LASER RPM TACHOMETER
Highly accurate, digital laser photo tachometer: measure rotational speed with a visible red light beam from a powerful LED. It's a great tool to measure the RPM of motors and propellers. 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.
Size : 180 x 72 x 37 mm (7.0 x 2.8 x 1.5").