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