G-SHOCK is a toughness watch that has continued to evolve in pursuit of insatiable strength since its release in 1983.This model uses recycled materials with a sustainability theme.
The band uses materials from the project "FOODTEXTILE", which reuses food materials scheduled for disposal as dyes, and the base model is the GA-B2100, which retains the octagonal form and is equipped with a smartphone link and tough solar.
The cross band of GA-B2100CT-1A5 is dyed with the color extracted from coffee, giving it a dark brown hue, and the cross band of GA-B2100CT-5A is dyed with the color extracted from echinacea, giving it a khaki gray color.
The gentle colors are characterized by using over 90% natural dyes.
In addition, the band uses TRUECOTTON, a TRACEABLE organic cotton that can be traced to farms and spinning factories, protecting the working environment and craftsmanship of all those involved in production. while reducing the burden on the environment.
Furthermore, the main resin parts of the bezel are made of biomass plastic, which is expected to contribute to reducing environmental impact by reducing CO2 emissions and using materials derived from renewable organic resources.
What was meant to be thrown away has now been reborn as a watch that is environmentally friendly and sustainable.

・Shockproof structure ・Tough solar (solar charging system)
・20 ATM waterproof function ・Mobile link function (function linked with compatible mobile phone via Bluetooth® communication)
- Needle retraction function (if the hands overlap the LCD display and are difficult to see, you can temporarily retract the hands from above the LCD display)
・ World time: 38 cities around the world (38 time zones, automatic summer time setting function) + UTC (coordinated universal time) time display, home time city switching function
・ Stopwatch (1/100 second (less than 1 hour) / 1 second (1 hour or more), 24 hour meter, wrap/split)
- Timer (set unit: 1 second, maximum set: 60 minutes, measured in 1 second increments)
- 5 time alarms - Time signal - Battery indicator display - Power saving function (turns off the display after a certain period of time in a dark place to save power)
・Full auto calendar ・12/24 hour display switching ・Operation sound ON/OFF switching function ・Date display (month/day display switching)
- Day of the week display (switchable between 6 languages: English, Spanish, French, German, Italian, and Russian)
・Double LED light: LED light for dial (with super illuminator, afterglow function, afterglow time switching (1.5 seconds/3 seconds)), LED backlight for LCD section (super illuminator, afterglow function, afterglow time switching (1.5 seconds)) seconds/3 seconds)
- When using the drive time function without solar power generation from full charge: Approximately 7 months When using power saving mode: Approximately 18 months *If not linked to a smartphone, normal quartz accuracy (average monthly difference ± 15 seconds) ) works with



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Casio   Analog-Digital   Silver   G-Shock GA2100   国内ブランド   Casio G-Shock Men's GA-B2100K-9AJR Love The Sea And The Earth Japan