This tachometer measures contact rpm and surface speed, noncontact rpm via laser, and noncontact temperature with infrared capabilities. For maximum safety, measure from up to 6 ½ (1.9 cm) feet away from the target. Noncontact temperature offers quick and safe surface temperatures for high temperature applications or in hard-to-reach areas. Other features include last reading, min and max memory, and display flips according to measurement mode.