Stopwatch features a dial of preselected count-down durations. Choose from 1, 3, 5, 10, 12, 15, 20, 25, 30, 35, 40, 45, 50, 55, and 60 minutes; or using the push-buttons, set the timer to countdown anywhere from 99 hours to 1 second. Display shows running time remaining to zero. When zero is reached, an alarm sounds for 5 seconds. Select the repeat-cycle mode and the timer will automatically begin to count down again from the programmed time.