Count up or down for 100 hours in intervals of 1 second. In the count down mode its unique feature tells you how much time has elapsed after the alarm sounds. Its memory allows for the repeat of a cycle just completed. Alarm clock mode. It comes complete with a built in stand, pocket clip, button cell battery, and magnet.
Dimensions: 2¾" x 2¾" x ½". Weight: 1.8 oz. With N.I.S.T. traceable certificate of compliance.
NIST traceable certificate