Screen Illumination A built-in light illuminates the watch face from the side. Stopwatch 1/100sec - 1 hour The elapsed time, the partial times and the final time aremeasured to the nearest hundredths of a second. The watch can measuretimes of up to an hour. Daily Alarm The daily alarm emits an acoustic signal at the scheduled time to remember those events that recur daily. Automatic Calendar Once set, the automatic calendar always shows the correct date. Timekeeping Indication for 12/24 hours Hours are displayed in either the 12 or 24 hour format. Resin Strap The strap contains synthetic resin, an ideal material for this component given its extreme strength and flexibility.