Casio G-Shock x Master Of G ft. Quad Sensor Mudmaster Men Casual Sports Round 200m Water Resistant Watch GG-B100-8A GGB100 GG-B100 Experience the ultimate fusion of strength and style with our premium watches, engineered for professionals who face the toughest challenges. Built with lightweight carbon fiber and rugged designs, these timepieces deliver unparalleled functionality and durability for those who demand the best. Battery Life / Accuracy Approximately 2 years (+/-15 seconds per month) Crystal Mineral crystal (curved) Light Double LED backlight (auto LED light, super illuminator, selectable illumination duration, afterglow) Case & Band Material Carbon / resin case with resin band Water Resistance 200m / 20 bar Case Size Thickness: 19.4 mm Diameter: 51.3 mm Length: 55.4 mm Other Specifications Casio G-Shock x Master Of G ft. Quad Sensor Mudmaster Shock resistant Mud resistant Carbon core guard structure Step counter (0 to 999,999 step count display range) Altimeter (measuring -700 to 10,000 meters) Barometer (260 to 1,100 hPa) Digital compass (0° to 359°) Thermometer (-10°C to 60°C) Mobile link (wireless linking via Bluetooth) World time (38 time zones) Sunrise, sunset time display 1/100-second stopwatch Countdown timer 5 daily alarms Hourly time signal Full auto-calendar (to year 2099) Button operation tone on/off 12/24-hour format Hand shift feature Regular timekeeping (analog-digital display)