Specifications: Mineral Glass Shock Resistant 200-meter water resistance Case / bezel material: Resin Resin Band LED Backlight (Super Illuminator)Selectable illumination duration, afterglow World time35 time zones (100 cities + coordinated universal time), city name display, daylight saving on/off 1/100-second stopwatchMeasuring capacity: 23:59'59.99'Measuring modes: Elapsed time, split time, 1st-2nd place times Countdown timerMeasuring unit: 1 secondInput range: 1 minute to 24 hours (1-minute increments and 1-hour increments) 5 alarms (daily or one-time) Hourly time signal Mobile link (Function linking using Bluetooth(r) v4.0 wireless communication) Vibrator Tap function Full auto-calendar (to year 2099) 12/24-hour format Button operation tone on/off Power Saving (Mobile Link turns off automatically after a fixed amount of time to save power.) Low battery warning (A warning appears on the display whenever battery power drops below a certain level.) Regular timekeeping: Hour, minutes, seconds, pm, month, date, day Accuracy: ±15 seconds per month Approximate battery operating time:2 years on CR2032(Mobile Link used 12 hours a day.) *Incoming call alert: 3 times/day *Incoming mail, other event alert: 10 times/day *Light: Once (1.5 seconds)/day *Alarm: 10 seconds/day