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The GA-B2100 is the solar and Bluetooth version of Casio's slim 'CasiOak' G-Shock, with an octagonal bezel and an analog-digital dial. Tough Solar keeps it charged from light, and Bluetooth links to the Casio Watches app for automatic time correction and phone finder. It keeps the 200m water resistance and shock resistance of the standard model. Against the non-solar GA-2100 it adds solar charging and Bluetooth, and it is thinner and lighter than most other G-Shock models. Owners like the slim case and the analog hands, though some find the negative LCD hard to read and the hands small in low light.
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Owners praise the slim CasiOak case, solar charging and Bluetooth timekeeping as a practical everyday G-Shock. Common complaints are the dim negative display and weak legibility of the hands at night.
The Casio G-Shock GA-B2100 FC-1ADR, known as the CasiOak, is an analog-digital watch with a blue resin strap. It belongs to the FC series, which has a different design treatment from the CY series in the same blue.
It is powered by Tough Solar, so light continuously charges it. Bluetooth connects it to the Move Link app. The watch is shock resistant and water resistant to 200 m.
