
Casio G-Shock Men's Bluetooth Quartz Chronograph Watch GMB2100D-1A
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The GMB2100D-1A is the full-metal version of the CasiOak: a stainless steel case and bracelet around a black dial, with the octagonal bezel that made the GA-2100 line popular. It keeps the G-Shock toughness — shock resistance and 200-meter water resistance — and adds Bluetooth so the watch syncs time with a phone, plus double LED light, world time across 38 cities, five daily alarms, a 1/100-second stopwatch and a countdown timer. At 44mm wide and 13mm thick it wears large but slim for a steel G-Shock. Against the resin GA-2100 it is heavier and dressier; against steel analog chronographs it offers more functions and far more abuse tolerance, though its mineral crystal and basic quartz movement are modest for the metal finish.
In stockSold by Inventory AdjustersReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
Owners of the metal CasiOak line praise the steel build, the slim case and the blend of toughness with a dressier look. Common complaints are the mineral crystal, the weight compared with resin models, and a busy dial that takes getting used to.
It has a black dial and a brushed and polished stainless steel case and bracelet. The crystal is mineral, and the watch is shock resistant and water resistant to 200 meters.
It shows 38 time zones (38 cities plus coordinated universal time), with a city code display and a city name display. You can turn daylight saving on or off, and the watch switches to summer time automatically. Home city and world time city can be swapped.
Other functions include a double LED light, five daily alarms, an hourly time signal, a 1/100 second stopwatch, a countdown timer and a full auto calendar. The time can be shown in 12 or 24 hour format.






