The G-Shock GAB2100-3A Bluetooth Solar 'CasiOak' blends modern tech with rugged durability. Its compact size (48.5×45.4×11.9mm, 52g) and carbon/resin construction make it lightweight yet tough. Powered by Tough Solar, it's eco-friendly and reliable. Bluetooth® connectivity adds convenience, while world time, stopwatch, timer, and alarm functions enhance versatility. With a double LED light for visibility, a full auto-calendar, and ±15 seconds per month accuracy, it's ready for any adventure.

- 48.5×45.4×11.9mm Case Size
- 52g Weight
- Carbon/Resin Case and Bezel　
- Resin Band
- Shock Resistant
- Carbon Core Guard structure
- 200 Meters Water Resistant
- Tough Solar (Solar powered)
- Smartphone Link feature: Mobile link (Wireless linking using Bluetooth®)
- Mineral Glass
- World time: 38 time zones (38 cities + coordinated universal time), city code display, city name display, daylight saving on/off, auto summer time (DST) switching, Home city/World time city swapping
- 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
- Power Saving (display goes blank to save power when the watch is left in the dark)
- Approx. battery operating time:
*7 months on rechargeable battery (operation period with normal use without exposure to light after charge)
*18 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)
- Accuracy: ±15 seconds per month (with no mobile link function)
- Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.)
- 12/24-hour format
- Date/month display swapping
- Day display (days of the week selectable in six languages)