A watch with style and functionality, plus an extra-long band for a more comfortable fit. The front button makes it simple to access the LED backlight so you can easily read the dial in dark places. These watches also come with handy everyday features like stopwatch, alarm, timer, calendar, and dual time functions, not to mention water resistance up to 100 meters and a 10-year battery you won�÷??ƒ?ª?ƒ?ªƒ?ût have to worry about for ages. Case / bezel material: Resin Resin Band Resin Glass 100-meter water resistance LED backlight Afterglow LED:Amber Dual time 1/100-second stopwatch Measuring capacity: 23:59'59.99'' Measuring mode: Elapsed time, split time, 1st-2nd place times Others: Target time alarm, auto start Countdown timer Measuring unit: 1/10 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) Others: Auto-repeat, progress beeper on/off Daily alarm Hourly time signal Full auto-calendar (to year 2099) 12/24-hour format Regular timekeeping: Hour, minute, second, pm, month, date, day Accuracy: Çï¶ÝÇï¶Ï30 seconds per month Approx. battery life: 10 years on CR2025 Size of case : 51.9 �÷??ƒ?ª‹¨« 45.7 �÷??ƒ?ª‹¨« 14 mm Total weight : 48g