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The GA-B2100BEG-1A is Casio's solar-powered take on the slim 'CasiOak' G-Shock, with analog hands over a digital display in a black-and-green colorway. It adds Tough Solar charging and Bluetooth phone linking to the octagonal case that made the GA-2100 line popular, while keeping 200 m water resistance and shock resistance. It suits people who want a tough everyday watch with a cleaner, less bulky profile than classic G-Shock squares. Against the standard GA-2100, it trades battery swaps for solar and adds smartphone time sync; against pricier metal CasiOaks, it stays resin and light on the wrist.
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Owners of the solar GA-B2100 line praise the slim case, light weight and set-and-forget solar charging. Many like the Bluetooth time sync and the CasiOak styling. Common complaints are legibility of the dial in dim light and scuffs on the resin and glass.
The Casio G-Shock GA-2100 Series GA-B2100BEG-1A is an analog-digital watch in a black and green finish. It has an impact-resistant structure and a resin strap.
The watch is water resistant to 200 meters. It is powered by Tough Solar, so it runs on solar power.
