The Casio G-Shock GA-B2 is an analogue-digital series within the G-Shock lineup, combining the classic octagonal case silhouette — first introduced with the GA-2100 — with Bluetooth connectivity for automatic time-syncing via the G-Shock Connected app. The series sits at a practical price point, making it one of the more accessible ways to get a connected G-Shock on your wrist.
What the GA-B2 brings to the G-Shock family
The GA-B2 builds on the Carbon Core Guard construction used in the GA-2100 series: a carbon-fibre reinforced resin case that keeps the watch notably slim and light without sacrificing the 200-metre water resistance and shock protection that define every G-Shock. The analogue hands sit over a digital display, giving you at-a-glance readability alongside the stopwatch, countdown timer, world time, and alarm functions standard to the line. Bluetooth here is not a smartwatch feature set — it is used specifically to sync the time automatically and to set world time zones from your phone, keeping the watch accurate without manual adjustment.
Who the GA-B2 suits
The slimmer profile makes the GA-B2 a better fit for those who find full-size G-Shock cases too bulky for everyday or office wear, while still needing a watch that can handle outdoor activity, travel, or the gym. It wears well on a range of wrist sizes. If you want a purely digital display, the Casio G-Shock DW-5600 is a more stripped-back alternative; for a metal-bezel version of the same octagonal form, the Casio G-Shock GM-69 is worth comparing. The Casio G-Shock GA-B0 series shares the Bluetooth time-sync feature if you want a larger-cased option in a similar price bracket.
Casio G-Shock GA-B2 in our selection
Our Casio G-Shock GA-B2 selection is a focused group of pieces, all from Casio, with prices running from around USD 175 to approximately USD 200. Colourway is typically the main variable within this series — the case and band construction remain consistent across references. For a broader look at what Casio produces across all categories, visit the full Casio brand page, or browse the wider watches selection to compare other brands and styles.
Is the G-Shock GA-B2 the same as the GA-2100?
The GA-B2 and GA-2100 share the same Carbon Core Guard case design and overall dimensions, but the GA-B2 adds Bluetooth connectivity for smartphone time-syncing. The GA-2100 does not have this feature. Both use the same resin band and analogue-digital display layout.
