Case / bezel material: Resin Resin Band Mineral Glass Shock Resistant 200-meter water resistance Electro-luminescent backlight Afterglow World time 29 time zones (48 cities + coordinated universal time), 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 alarms (with 1 snooze alarm) Hourly time signal Full auto-calendar (to year 2099) 12/24-hour format Button operation tone on/off Regular timekeeping Digital: Hour, minute, second, pm, month, date, day Accuracy: ±30 seconds per month Battery: 10 months on rechargeable battery (operation period with normal use without exposure to light after charge) 27 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge) Size of case : 53.2×50×17.7mm Total weight : 63g