Mineral Glass Shock Resistant 200-meter water resistance Case / bezel material: Resin Resin Band LED backlight (Super Illuminator) Selectable illumination duration, afterglow World time 35 time zones (100 cities coordinated universal time), city name display, daylight saving on/off 1/100-second stopwatch Measuring capacity: 23:59'59.99'' Measuring modes: Elapsed time, split time, 1st-2nd place times Countdown timer Measuring unit: 1 second Countdown range: 24 hours Countdown start time setting range: 1 minute to 24 hours (1-minute increments and 1-hour increments) 5 daily or one-time alarms Hourly time signal Mobile Link (Wireless linking using Bluetooth® v4.0) Vibrator Tap operation Low battery warning (A warning appears on the display whenever battery power drops below a certain level.) Power Saving (Mobile Link turns off automatically after a fixed amount of time to save power.) Full auto-calendar (to year 2099) 12/24-hour format Button operation tone on/off Regular timekeeping: Hour, minute, second, pm, month, date, day Accuracy: ±15 seconds per month Approx. 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: 1 time (1.5 seconds)/day *Alarm: 10 seconds/day Size of case/total weight: 53.2 X 50 X 17.7 mm/64 g LED:White