Non-contact RPM and revolution count measurements with 5 digit backlit LCD display. REED R7050 Offers This pocket-sized compact photo tachometer measures the RPM (revolutions per minute) of rotating objects without contact. The R7050 also features a digital counter capable of counting moving objects passing through the instrument's field of view and built-in memory capable of recalling maximum, minimum values as well as last value stored. Features Provides fast and accurate RPM measurements of rotating objects without contact and revolution count of moving objects Built-in laser pointer identifies target area Durable double molded plastic housing and backlit LCD display Internal memory recalls maximum, minimum values as well as last value stored Low battery indicator and auto shut-off Included Photo Tachometer Reflective Tape Soft Carrying Case Batteries