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The Casio G-SHOCK GA-B2100 is a slim analog-digital watch built on the octagonal 2100 case, here in the Urban Utility line's blue-gray and olive-green tones. It pairs a carbon core guard case with a bio-based resin band and weighs just 52 g, so it wears lighter than the chunky square 5600 models. It suits people who want a tough everyday watch with streetwear looks and don't need a metal case. Against the original GA-2100, the B2100 line adds Bluetooth and solar charging, which makes it the more practical pick for daily wear.
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Owners of the GA-B2100 line praise the slim, light case and the octagonal look, and many like the set-and-forget solar and Bluetooth timekeeping. Common complaints are the small, dim subdial display and the resin band feeling basic.
The G-SHOCK GA-B2100LUU series is an analog-digital watch from the Urban Utility line, which comes in blue-gray and olive-green. It is based on the G-SHOCK 5600 and 2100 styles and their case designs.
The case and bezel are made of carbon and bio-based resin, and the band is bio-based resin. The watch is shock resistant with a Carbon Core Guard structure, has a mineral glass crystal, and is water resistant to 200 meters. Neobrite is used as an additional exterior feature. It is powered by Tough Solar.
It connects to a smartphone over Bluetooth through the CASIO WATCHES app for automatic time adjustment and easy watch setting. Other phone-linked features include access to about 300 world time cities, time & place, a reminder and a phone finder. A hand shift feature moves the hands to give an unobstructed view of the digital display.
