Extech 461920 Mini Laser Photo Tachometer Counter - Laser Light Source used for greater accuracy and longer measuring distance

Features: 

• Make non-contact RPM measurements of rotating objects

• Use reflective tape on object to be measured and point the integral laser
• Large 5 digit LCD display with backlighting
• Memory button for Last/MAX/MIN readings
• Counter function counts up to 99,999 revolutions
• Rugged, double molded housing