Focused, high intensity Class II Laser beam can detect RPM readings from up to 6 feet away, improving safety near moving engine parts. Improved design with ergonomic shape and continuous backlit LCD display, great tool for easy and accurate measurement of RPM. Memory functions capture maximum, minimum and last reading. Applications include: diesel engines, gasoline engines, outboard engines, marine engines, small engines, snowmobile engines, industrial engines and more. Professional grade test instrument, carrying case, battery and instructions included Premium photo tachometer detects RPM readings with a 0 to 99,999 RPM range. Focused laser beam allows longer detection distance up to 6 feet. Easy to use and with an accuracy rating of +/- 0.05% +1 digit.  Easy to see 5 digit display with continuous backlighting.  Sampling rate of 2 readings per second.