These watches start with a durable exterior design, 100-meter water resistance, and 10-year battery life. Then add an on-board tide graph, moon data, and LED light ensuring an easy read even in the dark, to deliver everything a water sports enthusiast needs, right at your fingertips with a stopwatch, timer, and alarm, these versatile timepieces take you seamlessly from home or office to the pool or ocean.FEATURESCase/bezel material: ResinResin BandResin Glass100-meter water resistanceSPECIFICATIONSLED lightSelectable illumination duration (1.5 seconds or 3 seconds), afterglowMoon data (Moon age of the input data, Moon phase graph)Tide graph (Tide level for specific date and time)Dual time1/100-second stopwatchMeasuring capacity: 23:59’59.99”Measuring modes: Elapsed time, split time, 1st-2nd place timesCountdown timerMeasuring unit: 1 secondCountdown range: 24 hoursCountdown start time setting range: 1 minute to 24 hours (1-minute increments and 1-hour increments)Others: Auto-repeatMulti-function alarms3 independent multi-function alarms (2 one-time alarms and 1 snooze/one-time alarm)Alarm type: Daily alarm, date alarm, 1-month alarm, monthly alarmHourly time signalFull auto-calendar (to year 2099)12/24-hour formatButton operation tone on/offRegular timekeeping: Hour, minutes, seconds, am/pm, month, date, dayAccuracy: 30 seconds per monthApprox. battery life: 10 years on CR2025Size of case : 51.3×51.1×14.8mmTotal weight : 49gWarranty: 2 Year International Manufacturer's Warranty