G-Shock - GST-B400BB-1AER

Case size (L× W× H)\n46.6 × 49.6 × 12.9 mm\nWeight\n80 g\nCase and bezel material\nResin / Stainless steel\nBand\nResin Band\nConstruction\nShock Resistant\nCarbon Core Guard structure\nWater resistance\n200-meter water resistance\nPower supply and battery life\nTough Solar (Solar powered)\nSmartphone Link feature\nMobile link (Wireless linking using Bluetooth®)\nApps\nCASIO WATCHES\nWorld time\nWorld time\n38 time zones (38 cities + coordinated universal time), city code display, city name display, daylight saving on/off, auto summer time (DST) switching, Home city/World time city swapping\nStopwatch\n1/100-second stopwatch\nMeasuring capacity: \n00'00''00~59'59''99 (for the first 60 minutes)\n1:00'00~23:59'59 (after 60 minutes)\nMeasuring unit: \n1/100 second (for the first 60 minutes)\n1 second (after 60 minutes)\nMeasuring modes: Elapsed time, lap/split time\nTimer\nCountdown timer\nMeasuring unit: 1 second\nCountdown range: 60 minutes\nCountdown start time setting range: 1 second to 60 minutes (1-second increments and 1-minute increments)\nAlarm/hourly time signal\n5 daily alarms\nHourly time signal\nLight\nDouble LED light\nLED light for the face (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)\nLED backlight for the digital display (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)\nLight color\nLED:White\nCalendar\nFull auto-calendar (to year 2099)\nMute feature\nButton operation tone on/off\nEnergy saving feature\nPower Saving (display goes blank to save power when the watch is left in the dark)\nBattery display/alert\nBattery level indicator\nRun time\nApprox. battery operating time:\n7 months on rechargeable battery (operation period with normal use without exposure to light after charge)\n18 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)\nAccuracy\nAccuracy: ±15 seconds per month (with no mobile link function)\nOther features\n12/24-hour format\nDate/month display swapping\nDay display (days of the week selectable in six languages)\nHand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.)\nRegular timekeeping:\nAnalog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (battery level, mode)\nDigital: Hour, minute, second, pm, month, date, day