Mineral GlassShock ResistantScrew Lock BackISO 200 meters Water ResistanceCase / bezel material: Stainless steel / ResinResin BandElectro-luminescent backlightFull auto EL light, selectable illumination duration, afterglowSolar poweredWorld time31 time zones (48 cities + coordinated universal time), city code display, daylight saving on/offMoon data (moon age of the specific date, moon phase graph)Tide graph (tide level for specific date and time)Dive time and surface interval measurement functionDive time: 1 second increments, up to 23:59'59Surface interval: 1 minute increments, up to 47:59’59Memory capacity: One set of data (dive time, dive start time, dive date)1/100-second stopwatchMeasuring capacity: 23:59'59.99''Measuring modes: Elapsed time, split time, 1st-2nd place timesCountdown timerMeasuring unit: 1 secondCountdown range: 24 hoursCountdown start time setting range: 1 minute to 24 hours(1-minute increments and 1-hour increments)Daily alarms5 independent daily alarms (4 one-time alarms and 1 snooze alarm)Hourly time signalBattery power indicatorPower Saving (Display goes blank to save power when the watch is left in the dark.)Full auto-calendar (to year 2099)12/24-hour formatButton operation tone on/offRegular timekeeping: Hour, minute, second, pm, month, date, dayAccuracy: ±15 seconds per monthApprox. battery operating time:10 months on rechargeable battery (operation period with normal use without exposure to light after charge)27 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)Size of case: 58.3 × 52.8 × 18 mmTotal weight: 115 gEL:Blue Green in good condition as seen. There may be minor scratches on the case. but it is not noticeable. glass is clean. case overall 10/8.5 I have been in the retail industry since 2003. I worked in major watch companies and the clothing industry. My profession, which I love, focused on the clock. I'm researching. Sometimes I sell. It makes me happy that everyone is happy.