With the rugged looking W735 series, Casio re-introduces the vibration alarm, a function that is useful where discretion is required or in loud environments where audible alarm signals could be missed. The watch also includes a 10-year battery, is 100-meter water resistant and has a high-brightness LED light. All this and additional functionality provide great value for those who work hard and play harder. Black resin band, digital with neutral face.- 51.4 × 47.1 × 16.1mm Case Size- 50g Weight- Resin Band- 100 Meters Water Resistant - Approx. battery life: 10 years on CR2032- Resin Glass- World time- Dual time- Stopwatch- Timer- Alarm/hourly time signal- LED backlight (Super Illuminator)- Calendar: Full auto-calendar (to year 2099)- Accuracy: ±30 seconds per month- 12/24-hour format- Regular timekeeping: Hour, minute, second, pm, month, date, day- Vibe alert (daily alarm, hourly time signal, countdown timer time up, stopwatch auto start countdown)