Non-contact digital laser photo tachometer with a wide range of applications.
Large 18mm, 5 digit LCD display.
Testing Range: 2.5 ~ 99,999 RPM (rate / min).
Resolution:  0.1 RPM (2.5 ~ 999.9 RPM)     /    1 RPM (over 1,000 RPM)

Has a wide range of applications including measuring rotating speed of machine, motors, model cars, wheels, lathe for metal or wood cutting work etc.

Requires 9V battery (not included).