This is the Casio G-SHOCK 7900 Series a Digital Watch Features Case size - (Lx Wx H) 52.4 x 50 x 17.7 mm Weight - 68.2 g Case / bezel material - Resin Band - Resin Band Construction - Shock Resistant Water resistance - 200-meter water resistance Environmental resistance - Low temperature resistant (-20) Power supply and battery life - Approx. battery life: 2 years on CR2025 Glass - Mineral Glass World time29 time zones (48 cities), daylight saving on/offMoon dataMoon data (moon age of the input data, moon phase graph)Tide graphTide graph (tide level for specific date and time)Stopwatch1/100-second stopwatch (ST1)Measuring capacity: 999:59&';59.99&';&';Measuring modes: Elapsed time, split time, 1st-2nd place timesOther: 5-second countdown auto start1/100-second stopwatch (ST2)Measuring capacity: 999:59&';59.99&';&';Measuring modes: Elapsed time, split time, 1st-2nd place timesTimerCountdown timerMeasuring unit: 1 secondCountdown range: 24 hoursCountdown start time setting range: 1 minute to 24 hours (1-minute increments and 1-hour increments)Others: Auto-repeat, progress beeperAlarm/hourly time signalHourly time signal5 multi-function alarms (with 1 snooze alarm) Flash alert featureFlash alertFlashes with buzzer that sounds for alarms, hourly time signal, countdown timer time up alarm, countdown timer progress beeper, and stopwatch auto startLightElectro-luminescent backlightAuto light switch, selectable illumination duration (3 seconds or 5 seconds), afterglowLight colorEL:Blue GreenCalendarFull auto-calendar (to year 2099)Mute featureButton operation tone on/offAccuracyAccuracy: 15 seconds per monthOther features12/24-hour formatRegular timekeeping:Hour, minute, second, pm, month, date, day From G-SHOCK, the watch that brought unmatched toughness to personal timekeeping, comes a collection of models that deliver a level of protection. These watches are designed and engineered to become partners of people who like their activities rough and rugged.Major features include four large bezel screws and protruding surfaces that divide the form of the watch into six sections for a fashionable design. Buttons are among some of the largest available in the G-SHOCK lineup for easy operation.Low-temperature resistance allows operation even under very cold conditions, while moon and tide graphs provide essential information for marine leisure enthusiasts. A large LCD is divided into sections for that make information easy to locate and read whenever you need it.