Features: Shock resistant (G-SHOCK) Magnetic resistant LED light Auto light switch, selectable illumination duration, afterglow World time 29 time zones (48 cities + coordinated universal time), daylight saving on/off, Home city / World time city swapping 1/1000-second stopwatch Measuring capacity 9959'59.999'' Measuring modes Elapsed time, lap time, split time Others Speed (0 to 1998 units / hour), Distance input (0.0 to 99.9) Mach indicator (speed exceeding 1225 units / hour) Countdown timer Measuring unit 1 second Input range 1 minute to 24 hours (1-minute increments and 1-hour increments) Other Auto-repeat Daily alarms 5 independent daily alarms (4 one-time alarms and 1 snooze alarm) Hourly time signal Full auto-calendar (to year 2099) 12/24-hour format Regular timekeeping Analog 2 hands (hour, minute (hand moves every 20 seconds) Digital Hour, minute, second, pm, month, date, day Accuracy ±15 seconds per month Approx. battery life 2 years on CR1220 Size of case / total weight: 55.0 X 51.2 X 16.9 mm / 70 g