Casio G-Shock x GA-B001 Series ft. Sci-Fi Sensations Men Casual Sports Round 200m Water Resistant Watch GA-B001SF-7A GAB001SF GAB001 GA-B001 GA-B001SF Embark on an intergalactic journey with a futuristic timepiece that fuses style and innovation, transporting you to the cutting edge of sci-fi reality. Discover a watch that shines bright in the dark, featuring a bold design and radiant glow-in-the-dark accents. 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. Sci-Fi Sensations 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)