This tachometer has contact (0. 5 to 19,999 RPM) and non-contact (10 to 99,999 RPM) RPM measurement features that can be used in almost any application. Non-contact laser measurements up to 6.5 feet (2 meters) away for improved safety and convenience. Wheels for measuring linear surface speed (0.2 to 6560 ft/min; 0.05 to 1999.9 m/min) or RPM, 4 AA batteries, 23 in. (0.6 m) reflective tape, carrying bag, and user manual are included.