The G-Shock GA2100VB-1A 'CasiOak' Watch combines style with durability. With a compact 48.5×45.4×11.8mm case and weighing just 51g, it's lightweight and comfortable for everyday wear. Featuring a carbon/resin case and bezel with a shock-resistant Carbon Core Guard structure, it's built to withstand rugged use. Water-resistant up to 200 meters and powered by SR726W X 2 batteries, it offers reliable performance. It includes world time for 31 zones, stopwatch, timer, and alarm functions. The double LED light ensures visibility in any condition. With a full auto-calendar, mute feature, and hand shift function, it's convenient and accurate. Whether for work or leisure, the GA2100VB-1A is a dependable companion for any occasion.- 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- 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)- Mute feature: 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