1/100-second stopwatch Measuring capacity: 59'59.99" Measuring modes: Elapsed time, split time, 1st-2nd place times 12/24-hour format Accuracy: ±30 seconds per month Approximate Battery Life 3 Years on CR1616 Auto-calendar (to year 2099) Button operation tone on/off Countdown timer Measuring unit: 1 second Countdown range: 24 hours Countdown start time setting range: 1 minute to 24 hours (1-minute increments and 1-hour increments) 5 Independent Daily Alarms (4 one-time alarms and 1 snooze alarm) Electro-luminescent backlight Afterglow Hourly time signal Regular timekeeping Hour, minutes, seconds, am/pm, date, day Shock resistant World Time 29 time zones (48 cities), city code display, daylight saving on/off Size of case / total weight: 43.1 x 40.4 x 13.5 mm /38 g