Shock Resistant 200M Water Resistant LED light (Super Illuminator) Selectable illumination duration (1.5 seconds or 3 seconds), afterglow World time 31 time zones (48 cities + coordinated universal time), one touch UTC time zone, daylight saving on/off 1/100-second stopwatch Measuring capacity: 23:59'59.99'' Measuring modes: Elapsed time, split time, Countdown timer Measuring unit: 1 second Input range: 1 minnute to 60 minutes (1-minute increments) 5 daily alarms (with 1 snooze alarm) Hourly time signal Low battery warnin Full auto-calendar (to year 2099)12/24-hour format