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The GA-B2100 is Casio's slimmer, octagonal-case take on the G-Shock, and this version adds Tough Solar charging and Bluetooth phone linking to the classic analog-digital layout. It keeps the full G-Shock package: shock resistance, 200m water resistance, world time, stopwatch, timer, alarms and a double LED light. Against the original GA-2100 it fixes the two biggest complaints, battery swaps and fiddly setup, while staying thin and light on the wrist. It suits people who want a tough everyday watch with a utility look and don't need a metal case or a big feature screen.
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Owners rate the GA-B2100 highly as a tough, good-looking daily watch, and the solar-plus-Bluetooth version is the one most recommend over the battery-only original. The main complaints are the dim negative display and the price step up from the base model.
The Casio G-Shock GA-B2100 FC-3ADR, known as the CasiOak, is a G-Shock watch with an octagonal case design. This version has a military green resin strap.
It is powered by Tough Solar and has Bluetooth connectivity. It is shock resistant and water resistant to 200 m.
