Casio AE1500WH1AVEF an impressive 10-year battery life for long-lasting performance and reliability. It features a precise 1/100-second stopwatch for accurate time measurement, along with dual time functionality to keep track of two time zones simultaneously. With five daily alarms, you can easily manage your schedule, while the 10-bar water resistance makes it suitable for swimming and everyday water activities. The LED backlight ensures clear visibility in low-light conditions, and the wide face design provides a bold, easy-to-read display. Basic InformationCase size : 54.4 × 51.2 × 15.7 mmWeight : 57 gCase and bezel material : ResinBand : Resin BandWater resistance : 100-metre water resistancePower supply and battery life : Approx. battery life: 10 years on CR2032ExteriorGlass : Resin GlassCompatible band size : 145 to 215 mm Watch FeaturesWorld time : Dual timeStopwatch : 1/100-second stopwatch, Measuring capacity: 23:59'59.99''Measuring modes: Elapsed time, split time, 1st-2nd place timesTimer : Countdown timer, Measuring unit: 1 second , Countdown range: 24 hoursCountdown start time setting range: 1 minute to 24 hours (1-minute increments and 1-hour increments)Alarm/hourly time signal : Hourly time signal, 5 multi-function alarms (with 1 snooze alarm)Light : LED backlight, AfterglowLight colour : LED: AmberCalendar : Full auto-calendar (to year 2099)Accuracy : ±30 seconds per monthOther features12/24-hour formatRegular timekeeping:Hour, minute, second, pm, month, date, day