Mineral Glass Shock Resistant 200-meter water resistance Case / bezel material: Resin Resin Band Electro-luminescent backlight Selectable illumination duration, afterglow World time 29 time zones (48 cities), city code display, daylight saving on/off 1/100-second stopwatch Measuring capacity: 59'59.99'' Measuring modes: Elapsed time, split time, 1st-2nd place times 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 daily alarms (4 one-time alarms and 1 snooze alarm) Hourly time signal Full auto-calendar (to year 2099) 12/24-hour format Button operation tone on/off Regular timekeeping: Hour, minute, second, am/pm, date, day Accuracy: ±30 seconds per month Approx. battery life: 3 years on CR1616 Size of case: 44.7 × 40 × 12.5 mm Total weight: 44 g