Traceable triple-purpose timer. At the press of a button, big-digit timer displays countdown alarm time, stopwatch (count-up) time, and time-of-day (AM/PM) and 24-hour format). Accuracy is 0.01 percent. Full keyboard (0-9 keys) makes entering times exceptionally fast. High-decibel alarm sounds for 1 minute. Count down or up to 9 hours, 59 minutes, 59 seconds. To assure accuracy an individually serial-numbered traceable certificate is provided from our ISO 17025 calibration laboratory accredited by A2LA. It indicates traceability to standards provided by NIST (national institute of standards and technology). For repetitive tests, the unit’s memory automatically returns the display to the original programmed time. Three-quarter-inch-high digits may be read from 20 feet. Supplied with 2-year AAA battery and magnet on back.