Casio G-Shock GA-B2100N-2ADR CasiOak Solar Bluetooth Blue G-Shock Men's Watch

The blue G-Shock GA-B2100 CasiOak is the solar-powered, Bluetooth-connected version 
of one of the most talked-about watch designs of the last decade. Deep navy blue resin, 
the signature octagonal CasiOak bezel, and a profile so slim it disappears under a 
shirt cuff — this is the G-Shock blue colourway that serious collectors keep coming 
back to.

Watch enthusiasts worldwide dubbed it the "CasiOak" for its octagonal bezel, an 
unmistakable nod to the Audemars Piguet Royal Oak. In blue G-Shock form, that design 
language takes on a cooler, more refined character — equally at home on a weekend hike 
or a Monday morning commute.

The engineering behind it is equally impressive. Casio's Carbon Core Guard construction 
uses carbon fiber-reinforced resin to achieve just 11.9mm of case thickness and 
approximately 52 grams of weight — the slimmest solar-powered G-Shock ever built. It 
sits comfortably on any wrist and never feels heavy through a long day.

Where this model goes beyond the standard GA-2100 is in its power and connectivity. 
Tough Solar charging means you rarely think about the battery. Bluetooth links it to 
the free Casio Watches app, which automatically corrects the time up to four times 
daily, unlocks 300 world time cities, and lets you set alarms and reminders straight 
from your phone. Cut off from your phone entirely, it holds ±15 seconds per month 
accuracy and runs seven months on a full charge — or up to 18 months in power-saving 
mode.

FEATURES
— Tough Solar power (rechargeable battery)
— Bluetooth smartphone link (Casio Watches app)
— Carbon Core Guard carbon fiber-reinforced case
— 200-meter water resistance
— Iconic octagonal CasiOak bezel
— Analog-digital display with lume-painted hands
— World time: 300+ cities via app, 48 cities standalone
— 1/100-second stopwatch
— Countdown timer
— 5 daily alarms plus hourly time signal
— Shock resistant
— Full auto-calendar to year 2099

TECHNICAL DATA
— Case dimensions: 48.5 × 45.4 × 11.9 mm
— Weight: approx. 52 g
— Case material: carbon fiber-reinforced resin
— Strap: blue resin band
— Crystal: mineral glass
— Movement: quartz with Tough Solar and Bluetooth
— Battery life: approx. 7 months normal use / 18 months power-saving
— Accuracy: ±15 seconds per month standalone; phone-level accuracy when synced

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