Casio G-Shock x GA-B001 Series ft. Toughness Driven Men Casual Sports Round 200m Water Resistant Watch GA-B001-1A GAB001 GA-B001 Experience rugged sophistication with the latest G-SHOCK watches, featuring bold colors, advanced Smartphone Link functionality, and innovative design. Stay connected with Bluetooth technology and access essential features via the dedicated app, all while enjoying exceptional style and meticulous attention to detail. Battery Life / Accuracy Approximately 2 years (+/-15 seconds per month) Crystal Mineral crystal Light Double LED backlight (super illuminator, selectable illumination duration, afterglow) Case & Band Material Carbon / resin case with resin band Water Resistance 200m / 20 bar Case Size Thickness: 13.8 mm Diameter: 42.5 mm Length: 46.0 mm Other Specifications Casio G-Shock x GA-B001 Series ft. Toughness Driven Shock resistant Carbon core guard structure Mobile link (wireless linking via Bluetooth) Auto time adjustment (approximately 300 world time cities) Easy watch setting (time & place) App information (phone finder) World time (38 time zones) 1/100-second stopwatch Countdown timer 5 daily alarms Hourly time signal Full auto-calendar (to year 2099) Button operation tone on/off Hand shift feature (hands move out of the way to provide an unobstructed view of digital display) 12/24-hour format Day/month display swapping Day display (days of the week selectable in six languages) Regular timekeeping (analog-digital display)