The Performance Tool W89719 Professional Digital Laser LCD Tachometer is the perfect tool for anyone in need of precise and accurate rotational speed measurements. This non-contact tachometer uses a high-intensity class II laser to emit a visible red LED beam that enables easy and precise measurements. Capable of measuring rotational speeds from 2.5 - 99,999 RPM, this tachometer is suitable for use in a variety of applications. With an auto-zero adjustment function that saves the last, minimum, and maximum readings, the Performance Tool W89719 is incredibly easy to use. This tachometer comes with a handy storage case, 24-inches of reflective tape, a 9v battery, and an operating manual, making it easy to store and transport wherever you go. Get the accurate measurements you need with the Performance Tool W89719 Professional Digital Laser LCD Tachometer.