8 Memory Stopwatch Digital Count Up / Countdown Timer and Stopwatch Counts up or down for 100 hours in intervals of 1 second. In count down mode unique feature tells you how much time has elapsed after the alarm sounds. Memory allows repeat of just completed cycle. Alarm clock mode. Has a built-in stand, pocket clip, and magnet. A button cell battery is included. N.I.S.T. traceable certificate of compliance available. Dimensions: 2¾” x 2¼” x ¾” Weight: 2.7 oz.