Electronic Specialties 332 Pro Laser No-Contact Photo Tachometer 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