Both the digital and analogue areas of the watch face glow when the EL backlight is turned on.
Shock-resistant
Shock-resistant construction protects against impact and vibration.
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.
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.
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.
3 Years - 1 Battery
The battery supplies the watch with sufficient energy for approx. three years.
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
Original box
Reviews about G-SHOCK Octagon Original Perfect Balance Carbon Core Guard GA-2100SU-1AER (7)
I ordered a watch with a Japanese quartz movement and a very long battery life. Perfect for everyday use. The store did a great job; same-day delivery in Warsaw was a big plus. I’m very happy with my purchase and would recommend it to anyone.
Janusz N.
12/17/25
100%
I bought this G-SHOCK watch and I'm happy with it. The black plastic case looks sturdy and stylish. The store guarantees that the products are authentic, which I really appreciate. I recommend it.
Rafaello/Рафаель
7/12/24
80%
The G-SHOCK watch is a great choice, especially thanks to its silicone strap. It’s incredibly comfortable and fits snugly on the wrist, which is crucial for me since I wear my watch all day long. I also rate the chat support with an expert very highly—I received quick answers to all my questions, which made it easier for me to decide to buy. I can definitely recommend this model!
Gerard Y.
4/27/24
100%
Great quality
Malix
4/18/24
100%
The G-SHOCK watch is amazing! What I appreciate most is the silicone strap, which is incredibly comfortable and doesn’t irritate the skin, even when worn for long periods of time. Plus, the silicone is very durable and easy to clean, which is a big plus. Shopping at the store was simple and convenient, thanks to the wide range of payment methods—I was able to choose the option that worked best for me. I definitely recommend it!
Paulo
2/25/24
100%
Lately, my hobby has been riding a quad bike on dirt roads, which are often quite muddy. Until now, the watches in my collection weren’t suitable for this kind of activity. I decided on this G-Shock model because it’s made from materials that are easy to use and clean, and that was what mattered most to me. Plus, the watch has a lot of features and offered gift wrapping, so I took advantage of that option since I’m turning 40 in a few days :). I highly recommend it.
Tomasz
1/2/22
100%
The watches are really high quality and nice, they are also at a good price ... I am completely satisfied ....
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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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