LED lightSelectable illumination duration (1.5 seconds or 3 seconds), afterglow World time29 time zones (27 cities +coordinated greenwich mean time), daylight saving on/off 1/100-second stopwatchMeasuring capacity: 5959.99"Measuring modes: Elapsed time, split time, 1st-2nd place times Countdown timerMeasuring unit: 1 secondCountdown range: 60 minutesCountdown start time setting range: 1 to 60 minutes (1-minute increments)Others: Auto-repeat, progress beeper 5 daily alarms (with 1 snooze alarm) Hourly time signal Full auto-calendar (to year 2039) 12/24-hour format Regular timekeepingAnalog: 2 hands (hour, minute (hand moves every 20 seconds))Digital: Hour, minute, second, pm, month, date, day Accuracy: ±30 seconds per month Approx. battery life: 3 years on CR1220 Size of case : 47.5×42.8×12.8mm Total weight : 43g