• Includes: Zippered case, reflective tape, instructions and 9V battery
• Memory function saves maximum and minimum rpm readings
• Measures up to 99,999 rpm in 1 rpm increments and can be used to measure rpm on coil-on-plug & diesel engines
• Simple operation, just aim at reflective mark to get rpm

Ideal tool for easy & accurate measurement of rpm in almost any environment. High intensity laser beam not affected by shop light, detects rpm from up to 6 ft. away.