Casio G-Shock x G'MIX ft. Music Theme Men Casual Sports Round 200m Water Resistant Watch GBA-400-4A GBA400 GBA-400Discover the ultimate music companion: a new collection of Bluetooth SMART watches that put music control at your fingertips. Seamlessly connect to your smartphone, search song titles, and adjust sound attributes with ease, all while enjoying a stylish design inspired by the world of music.Battery Life / AccuracyApproximately 2 years (+/-15 seconds per month)CrystalMineral crystalLightLED light (super illuminator, selectable illumination duration, afterglow)Case & Band MaterialResin case with resin bandWater Resistance200m / 20 barCase SizeThickness: 18.3 mmDiameter: 51.9 mmLength: 55.0 mmOther SpecificationsCasio G-Shock x G'MIX ft. Music ThemeShock resistantMobile link (wireless linking via Bluetooth SMART)World time (35 time zones)1/100-second stopwatchCountdown timer5 daily alarmsHourly time signalFlash alert (flashes with buzzer that sounds for alarms and hourly time signal)Full auto-calendar (to year 2099)Button operation tone on/offLow battery alert12/24-hour formatHand shift featureAirplane modeRegular timekeeping (analog-digital display)