WS210HD-1A

Case / bezel material: ResinResin BandResin Glass / Spherical Glass100-meter water resistanceLED backlight Selectable illumination duration, afterglowSolar poweredWorld time 31 time zones (48 cities + coordinated universal time), city code display, daylight saving on/offMoon data (moon age of the input data, moon phase graph)Tide graph (tide level for specific date and time)1/100-second stopwatch Measuring capacity: 23:59'59.99'' Measuring modes: Elapsed time, split time, 1st-2nd place timesCountdown timer Measuring unit: 1 second Input range: 1 minutes to 24 hours (1-minute increments and 1-hour increments)Daily alarms 5 independent daily alarms (4 one-time alarms and 1 snooze alarm)Hourly time signalBattery power indicatorPower Saving (Display goes blank to save power when the watch is left in the dark.)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 operating time: 11 months on rechargeable battery (operation period with normal use without exposure to light after charge) 29 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)