The PLT26 precision laser tachometer by Pyle, accurately measures RPMs at a stunning range of 2.5 to 99,999. To take a measurement, apply the reflective marks provided to the surface being measured, then aim the laser, push the side button and the RPM reading is immediately displayed. The 5 digit LCD display makes reading measurements simple and easy. No contact with the shaft or wheel is necessary. Comes with reflective tape and cushioned carrying case.