Resin Glass 100-meter water resistance Case / bezel material: Resin Resin Band LED light Selectable illumination duration, afterglow Multi Time (4 different cities) World time 31 time zones (48 cities coordinated universal time), daylight saving on/off, Home city/World time city swapping 1/100-second stopwatch Measuring capacity: 23:59'59.99'' Measuring modes: Elapsed time, split time, 1st-2nd place times Countdown timer Measuring unit: 1/10 second Input range: 1 second to 24 hours (1-second increments, 1-minute increments and 1-hour increments) 5 daily or one-time alarms Hourly time signal 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: ±30 seconds per month Approx. battery life: 10 years on CR2025 Size of case: 45 X 42.1 X 12.5 mm total weight: 39 g LED:Umber