Casio G-Shock GA-B2100C-9ADR CasiOak Solar Bluetooth Yellow G-Shock Men's Watch

The Casio G-Shock GA-B2100 — widely known as the "CasiOak" — is one of the most 
iconic yellow G-Shock watches ever made. Recognised instantly by its octagonal bezel 
inspired by the Audemars Piguet Royal Oak, this bold yellow G-Shock delivers 
Tough Solar charging and automatic Bluetooth time sync in the slimmest solar G-Shock 
package Casio has ever built.

If you have been searching for a g shock yellow color that combines serious functionality 
with a striking, head-turning design — this is it. The vibrant yellow resin case and 
strap make the GA-B2100C-9ADR one of the most sought-after yellow G-Shock colourways 
in the entire CasiOak lineup.

Built on Casio's Carbon Core Guard construction, the case uses carbon fiber-reinforced 
resin to achieve just 11.9mm of thickness and approximately 52 grams of weight — 
making it the slimmest solar-powered G-Shock ever made. It wears comfortably on any 
wrist size and transitions effortlessly from daily office wear to outdoor adventures.

Connected to the free Casio Watches app via Bluetooth, the watch automatically adjusts 
its time up to four times a day, gives access to 300 world time cities, and adds 
reminders, a phone finder function, and easy alarm setting from your phone. Without a 
connection, it maintains standalone accuracy of ±15 seconds per month and runs 
approximately seven months on a full solar 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: yellow 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

Sold by CaptainBlingJewelers — 100% genuine, brand new, full manufacturer warranty. 
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