Upgrade the retro look you love with the octagonal GA-2100 line, inheriting the classic design concept with added Smartphone Link and Tough Solar power.

Featuring the slim Carbon Core Guard structure, it delivers shock resistance with a carbon fiber-reinforced resin case and a dual-layer dimensional dial.

Equipped with Bluetooth connectivity via the CASIO WATCHES app, automatic time adjustment, and 200-meter water resistance.

Key Features

Brand	CASIO G-SHOCK
Model Number	GA-B2100-3A
Case Size (L × W × H)	48.5 × 45.4 × 11.9 mm
Weight	52 g
Case and Bezel Material	Carbon / Resin
Band	Resin Band
Construction	Shock Resistant, Carbon Core Guard structure
Water Resistance	200-meter water resistance (20 bar)
Power Supply	Tough Solar (Solar powered)
Time Adjustment	Bluetooth: Connects to a smartphone and automatically adjusts the time
Illumination	Double LED light (Super Illuminator)

Highlights

Shock resistant
20 bar water resistant
Timekeeping functionality
Stable solar power
Smartphone connectivity
Illuminated display for visibility in darkness

Frequently asked questions

How is the GA-B2100-3A powered?

It is powered by Tough Solar technology, which provides stable solar-powered operation.

What is the water resistance rating of this watch?

The watch features a 20-bar (200-meter) water resistance rating.

How does the watch connect to a smartphone?

It connects wirelessly via Bluetooth using the CASIO WATCHES smartphone application for features like automatic time adjustment and event reminders.

What materials are used for the case and band?

The case is built with a Carbon Core Guard structure made of carbon and resin, paired with a durable resin band.

What are the dimensions and weight of the watch?

The case measures 48.5 × 45.4 × 11.9 mm and the watch weighs 52 g.

Does the watch have illumination for dark environments?

Yes, it is equipped with a high-brightness double LED light (Super Illuminator) for readability in darkness.

Casio G-Shock Retro Green Dial Solar Watch GA-B2100-3ADR