The Casio G-Shock GA-2100-1A3ER is the "CasiOak": a slim, octagonal-bezel G-Shock with analog hands and a small digital window. Its Carbon Core Guard case keeps it shock-resistant at just 51 g and 11.8 mm thick, far slimmer than classic square G-Shocks. It suits people who want G-Shock toughness in a lighter, more everyday-wearable shape. Owners praise the light weight and looks; the common complaints are the small digital display and the basic resin strap.
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Owners rate it highly for its light, slim build and the octagonal look that sets it apart from other G-Shocks. Criticism centers on the small digital display and the plain strap.
The Casio G-Shock GA-2100-1A3ER is a watch with a carbon and resin case and bezel. It uses a Carbon Core Guard structure and a shock resistant design to withstand impacts. It is water resistant to 200 meters.
The display combines analog and digital time. The analog side has hour and minute hands and a day dial. The minute hand moves every 20 seconds. The digital side shows hour, minute, second, pm, month and date.
It has a stopwatch and a countdown timer. It runs on two SR726W batteries, with a battery life of about 3 years.
