Meet the G-Shock 'Oak' GA2100-1A1 Black Watch, a timeless icon of durability and style. Crafted with a Carbon/Resin case and bezel, this timepiece exudes strength while maintaining a sleek profile, measuring just 48.5 × 45.4 × 11.8mm and weighing a mere 51g. Built to withstand shocks and water pressure up to 200 meters, it's ready for any adventure. Powered by SR726W X 2 batteries, it boasts an impressive battery life of approximately 3 years. With its mineral glass face, it offers a clear view of its multifunctional capabilities, including world time, stopwatch, timer, and alarm functions. The double LED light system ensures visibility in any environment, while the full auto-calendar keeps you organized up to the year 2099. With precise timekeeping and convenient features like button operation tone control and a hand shift feature for unobstructed viewing, the 'Oak' GA2100-1A1 is not just a watch—it's a statement of resilience and versatility.- 48.5 × 45.4 × 11.8mm Case Size - 51g Weight- Carbon/Resin Case and Bezel　- Resin Band- Shock Resistant- Carbon Core Guard Structure- 200 Meters Water Resistant - Approx. battery life: 3 years on SR726W X 2- Mineral Glass- World Time: 31 time zones (48 cities coordinated universal time), daylight saving on/off- Stopwatch- Timer- Alarm/hourly time signal: 5 daily alarms- Double LED light*LED light for the face (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)*LED backlight for the digital display (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)- Calendar: Full auto-calendar (to year 2099)- Button operation tone on/off- Accuracy: ±15 seconds per month- 12/24-hour format- Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.)- Regular timekeeping:*Analog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (day)*Digital: Hour, minute, second, pm, month, date