Shock resistant digital watch sleek gloss housing and band metal clasp 200M Water Resistant Auto LED Backlight (Super Illuminator) Flash alertFlasher with buzzer that sounds for alarms, hourly time signal, countdown timer time-up alarm, countdown timer progress beeper Multi-time (4 different cities) World Time31 time zones (48 cities UTC), city code display, daylight saving onoff 5 Independent Alarms (one-time or daily) Hourly Time Signal 1100 second stopwatchMeasuring capacity: 23:5959.99Measuring modes: Elapsed time, split time, 1st-2nd place times Countdown timerMeasuring unit: 110 secondCountdown range: 24 hoursCountdown start time setting range: 1 minute to 24 hours (1-second increments, 1-minute increments and 1-hour increments)Other: progress beeper Full Auto Calendar (pre-programmed until the year 2099) 1224 Hour Formats Button operation tone onoff Accuracy: -15 seconds per month Battery: CR2025 Approx. battery life: 7 years By G-SHOCK