Case / bezel material: ResinResin BandResin Glass100-meter water resistanceLED backlight (Super Illuminator) AfterglowDual time1/100-second stopwatch Measuring capacity: 23:59'59.99'' Measuring modes: Elapsed time, split time, 1st-2nd place times Other: 5-second countdown auto startCountdown timer Measuring unit: 1 second Countdown range: 24 hours Countdown start time setting range: 1 second to 24 hours (1-second increments, 1-minute increments and 1-hour increments)Daily alarmHourly time signalVibe alert (daily alarm, hourly time signal, countdown timer time up, stopwatch auto start countdown)Full auto-calendar (to year 2099)12/24-hour formatButton operation tone on/offRegular timekeeping: Hour, minute, second, pm, month, date, dayAccuracy: ±30 seconds per monthApprox. battery life: 10 years on CR2032 
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