Digital timer is used to clock classroom or laboratory activities, and is operated with three keys for ease of use Lap, Stop/Start, and On/Reset. The timer’s display reads in hours, minutes, seconds, and hundredths of seconds for precise measurement. Its Lap key can be used for tracking elapsed time while the timer continues to run. The timer is a bright red color for visual identification and measures 2.0 x 2.0 x 7/16 inches (L x H x W). The timer runs on one lithium button battery such as a G10-A or similar battery (sold separately) and is suitable for all grades and ages.