Case / bezel material: ResinCloth BandShock ResistantMineral Glass200-meter water resistanceElectro-luminescent backlight Auto light switch, selectable illumination duration (3 seconds or 5 seconds), afterglowFlash alert Flashes with buzzer that sounds for alarms, hourly time signal, countdown timer time up alarm, countdown timer progress beeper, and stopwatch auto startLow temperature resistant (-20°C)World time 29 time zones (48 cities), daylight saving on/off1/100-second dual stopwatches (ST1, ST2) Measuring capacity: 999:59'59.99'' Measuring modes: Elapsed time, split time, 1st-2nd place times Other: Auto start (ST1 only)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) Others: Auto-repeat, progress beeper5 multi-function alarms (with 1 snooze alarm)Hourly time signalFull auto-calendar (to year 2099)12/24-hour formatButton operation tone on/offRegular timekeeping: Hour, minute, second, pm, month, date, dayAccuracy: ±15 seconds per monthApprox. battery life: 3 years on CR2025 
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