Casio G-Shock x GD-100 Series ft. Toughness Pursuit Men Casual Sports Round 200m Water Resistant Watch GD-100-1B GD100 GD-100Experience unparalleled visibility with a high-brightness LED backlight, perfect for reading in the dark. Stay on top of your schedule with practical features like world time, alarm, and stopwatch. Classic G-SHOCK design with a pop of brand-color red accents. Uncompromising style meets exceptional functionality.Battery Life / AccuracyApproximately 7 years (+/-15 seconds per month)CrystalMineral crystalLightLED backlight (auto light switch, selectable illumination duration, afterglow)Case & Band MaterialResin case with resin bandWater Resistance200m / 20 barCase SizeThickness: 17.4 mmDiameter: 51.2 mmLength: 55.0 mmOther SpecificationsCasio G-Shock x GD-100 Series ft. Toughness PursuitShock resistantMulti time (4 different cities)World time (31 time zones)1/100-second stopwatchCountdown timer5 daily alarmsHourly time signalFlash alert (flashes with buzzer that sounds for alarms, hourly time signal and countdown timer)Full auto-calendar (to year 2099)Button operation tone on/off12/24-hour formatRegular timekeeping (digital display)