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The GA-B2100 is Casio's slimmed-down 'CasiOak' take on the classic G-Shock, adding Tough Solar charging and Bluetooth phone linking to the octagonal case. It keeps 200m water resistance and shock resistance in a case noticeably thinner than the standard GA-2100 line, so it wears flatter on the wrist. The matte grey resin strap gives this colorway a low-key, tactical look. It suits people who want a tough everyday watch with solar power and phone-assisted timekeeping without a bulky case.
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Owners of the GA-B2100 line generally praise the slimmer case, solar charging and the octagonal look, calling it an easy everyday G-Shock. Common complaints center on the resin strap's long-term durability and the fiddly analog-digital legibility.
The Casio G-Shock GA-B2100 LUU-5ADR, known as the CasiOak, is a solar-powered watch with Bluetooth. It has a matte grey resin strap and a matte finish for an understated, tactical look.
It uses Tough Solar charging and connects to the Casio Move Link app over Bluetooth. It is shock resistant and water resistant to 200 m.
