Case / bezel material: ResinResin BandShock ResistantMineral GlassMud Resistant200-meter water resistanceElectro-luminescent backlight Auto light switch, dual illuminator, selectable illumination duration, 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), city code display, daylight saving on/off1/100-second stopwatch (ST1) Measuring capacity: 999:59'59.99'' Measuring modes: Elapsed time, split time, 1st-2nd place times Other: Auto start1/100-second stopwatch (ST2) Measuring capacity: 999:59'59.99'' Measuring modes: Elapsed time, split time, 1st-2nd place timesCountdown 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 beeperMulti-function alarms 5 independent multi-function alarms (4 one-time alarms and 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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