The watch is equipped with energy-saving Bluetooth® technology, which offers power-saving data transfer at the push of a button. The watch can connect to a smartphone wirelessly via Bluetooth®, enabling access to a wide range of useful functions.
Super-Illuminator
At the touch of a button, the display can be brightly illuminated in a fashionable color
Shock-resistant
Shock-resistant construction protects against impact and vibration.
Solar Power
A solar cell provides power for operation.
Neo-display
A luminous coating provides long-term illumination in the dark after only a short exposure to light.
World time function
Displays the current time in major cities and specific areas around the world.
Stopwatch function - 1/100 sec. - 24 hours
Accuracy of measurement up to 1/100 of a second, measuring range up to 24 hours.
Timer - 1/1 sec. - 24 hours
For fans of precision: the countdown timers help you to remember specific or recurring events by giving off an audible signal at a preset time. They The time can be set to the nearest second and up to 24 hours in advance.
5 daily alarms
The daily alarm reminds you about recurring events with an acoustic signal at the time you have set. This model has 5 independent alarms for flexible reminders of important appointments.
Multi-language
The name of the day can be displayed in different languages.
Button tones on/off
The button tones for using the mode button can be turned off. This means that the watch no longer beeps when switching from one function to another. Preset alarm or countdown timers remain active when the button tones are deactivated.
Hand Moving Function
With a push of a button, hands are moving and permit a free visibility of functions like stopwatch or date.
Phone Finder
Misplaced your smartphone? All it takes is the push of a button on your watch and the smartphone sounds an alarm.
Automatic calendar with Date, Day and Month
Once set, the automatic calendar always displays the correct date.
12/24-hour timekeeping
Times can be displayed in either a 12-hour or 24-hour format.
Mineral glass
The tough mineral glass resists damages.
Carbon-reinforced resin casing
Thanks to its extremely high level of durability, resin is the ideal material for watches. Combining resin with carbon—a particularly robust material—creates a casing that is even more stress-resistant and offers even greater protection against external influences, resulting in an extremely high level of durability.
Resin band
Synthetic resin is the ideal material for wrist straps thanks to its extremely durable and flexible properties.
Folding clasp
The watch has a folding clasp.
Water resistance classification (20 bar)
Perfect for free diving without scuba gear: the watch is water resistant up to 20 bar according to ISO 22810.
What’s in the box?
3-year warranty
User manual
Warranty card
Casio box
Reviews about G-SHOCK Octagon Carbon Core Guard Bluetooth Tought Solar GA-B2100-1AER (10)
The black rubber strap turned out to be a major plus—it not only looks great but also ensures everyday comfort and durability. It’s a very practical detail. The entire shopping process in the store was intuitive and simple. I had no trouble finding the model I was interested in. The store staff took care of every detail of the order. The package was securely packed, so the watch arrived in perfect condition. I am very satisfied with the quality of the product. In my opinion, a watch like this is a great gift idea, especially for a milestone birthday. It will certainly bring joy and be remembered for a long time.
Jimmy
3/12/26
100%
The product is as described, and shipping was very fast.
Dariusz Bryniak
2/17/26
100%
This watch offers complete freedom around water thanks to its 200-meter water resistance, making it the perfect companion for both everyday activities and extreme adventures. Features such as world time, a precise stopwatch, and a timer are displayed here in a highly legible analog-digital format, while the Neobrite coating and bright Super Illuminator backlight ensure perfect readability in total darkness. By choosing this model, you get a watch that is virtually maintenance-free, offers free engraving for full personalization, and is covered by a solid three-year manufacturer’s warranty with the option to extend it.
RD
1/14/26
100%
Fast shipping, great customer service.
Cezaryk.
12/26/25
100%
The product met my expectations
Ryan
11/12/25
100%
The watch is very durable and looks great on the wrist. I'm pleased with its solid build quality and comfort. Shopping at this store is a real pleasure—I recommend it to everyone.
Kinga DKE.
7/5/25
100%
A G-SHOCK watch is a great gift idea! The rubber strap is very practical—durable, lightweight, and fits snugly on the wrist, ensuring comfort even during physical activity. I also appreciated the wide range of payment options, which made the purchase much easier and allowed me to feel secure while shopping online. It’s a combination of exceptional quality and comfort you can rely on!
Beatka78
9/21/24
100%
Here it is—I finally have it. It’s the one I’ve been searching for, my dream device, and it’s solar-powered to boot. A bundle of joy. Why did I want it so badly? There are two reasons: the first is Bluetooth® Smart technology, and the second is the solar-powered mechanism, which helps not only me but also the environment save energy. It’s great that you can pay for your order using Apple Pay.
Łucjan
6/8/24
100%
The G-SHOCK watch is a real hit for me! The rubber strap is super comfortable, doesn’t pinch my wrist, and works great even during intense workouts. An added bonus is the option to order a free custom engraving—I chose my wedding date, and now I have a gadget that’s not only functional but also sentimental. I’m truly delighted and highly recommend it. Rating: 5/5!
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The administrator of your personal data is the owner of the Watchard store, i.e. 57 Concepts Sp. z o.o. Sp. k. with the registered office at al. Witosa 31, lok. 115, 00-710 Warsaw, Poland. Providing personal data by the Customer is voluntary but necessary to complete the purchase. You have the right to view your personal data we have processed, as well as the right to request changes or removal of your personal data. Personal data will be processed for a period of 10 years.
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The administrator of your personal data is the owner of the Watchard store, i.e. 57 Concepts Sp. z o.o. Sp. k. with the registered office at al. Witosa 31, lok. 115, 00-710 Warsaw, Poland. Providing personal data by the Customer is voluntary but necessary to complete the purchase. You have the right to view your personal data we have processed, as well as the right to request changes or removal of your personal data. Personal data will be processed for a period of 10 years.
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