Timer: Counts down from 99 hours, 59 minutes, 59 seconds to 1 second. Stopwatch: Counts up from 1 second to 99 hours, 59 minutes, 59 seconds. Timing capacity: 100 hours Accuracy: 0.01% “Thru-zero” function counts down, alarms count up Includes a 12/24 hour clock Time-out mode Easel stand, lapel clip, the hole for a lanyard, and magnetic back The alarm can be silenced automatically or manually Extra-loud, 70 dB alarms for 1 minute or can be silenced manually Memory recall Time-of-day clock feature