Case / bezel material: Resin    Resin Band    Resin Glass    100-meter water resistance    LED backlight (Super Illuminator)    Afterglow    Dual time    1/100-second stopwatch    Measuring capacity: 23:59'59.99''    Measuring modes: Elapsed time, split time, 1st-2nd place times    Other: 5-second countdown auto start    Countdown 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 alarm    Hourly time signal    Vibe alert (daily alarm, hourly time signal, countdown timer time up, stopwatch auto start countdown)    Full auto-calendar (to year 2099)    12/24-hour format    Regular timekeeping: Hour, minute, second, pm, month, date, day    Accuracy: ±30 seconds per month    Approx. battery life: 10 years on CR2032    Size of case / Total weight    Size of case : 51.4×47.1×16.1mm    Total weight : 50g