Casio G-Shock x GD-100 Series ft. Toughness Pursuit Men Casual Sports Round 200m Water Resistant Watch GD-100GB-1C GD100GB GD100 GD-100 GD-100GB Experience 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 / Accuracy Approximately 7 years (+/-15 seconds per month) Crystal Mineral crystal Light LED backlight (auto light switch, selectable illumination duration, afterglow) Case & Band Material Resin case with resin band Water Resistance 200m / 20 bar Case Size Thickness: 17.4 mm Diameter: 51.2 mm Length: 55.0 mm Other Specifications Casio G-Shock x GD-100 Series ft. Toughness Pursuit Shock resistant Multi time (4 different cities) World time (31 time zones) 1/100-second stopwatch Countdown timer 5 daily alarms Hourly time signal Flash alert (flashes with buzzer that sounds for alarms, hourly time signal and countdown timer) Full auto-calendar (to year 2099) Button operation tone on/off 12/24-hour format Regular timekeeping (digital display)