10-YEAR BATTERY LIFE Face design resembles an aircraft cockpit instrument World map for World Time LC Analog display (Home city time) 100-meter water resistance Resin Glass / Spherical 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) Alarms 5 independent alarms (one-time or daily) 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: ?ñ30 seconds per month Approx. battery life: 10 years on CR2025 Size of case: 48.1 X 43.7 X 13.7 mm total weight: 40 g LED:Umber