The watch always measures time accurately and rarely breaks down thanks to a reliable solar movement that is powered by sunlight. The steel black case has a movement inside. The black strap is made of silicone - the material which is characterised by lightness and high level of damage resistance. It perfectly goes with the watch case. A mineral crystal provides a great protection against shocks and scratches and perfectly goes with the black case. The watch with a water resistance of 200 meters means it can be worn while swimming or freediving at greater depths. Casio G-SHOCK GST-B100-1AER is an authentic watch that you can purchase in our authorised store. The model is packed in a branded box and comes with a manufacturer's warranty.
Functions
Bluetooth® Smart
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.
LED light
A light-emitting diode (LED) is used to illuminate the watch face.
Shock-resistant
Shock-resistant construction protects against impact and vibration.
Vibration-resistant
AlphaGEL elements surround the watch, making it even more resistant to shocks and vibrations. AlphaGEL is a silicone material. It is extremely flexible and has a cushioning effect on the module.
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.
Dual Time Display
Dual Time simultaneously displays the time in two different time zones.
Date and weekday display
The current day and weekday are both displayed.
Stopwatch function - 24 hours
Elapsed times are measures with split-second accuracy. The watch can measure times of 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.
Daily alarm
The daily alarm reminds you of events that recur every day, by emitting an audible signal at the set time.
Crown button lock
Secures the crown button from accidental change to another mode of operation.
Smart Access Technology
Smart Access makes it easy to operate CASIO’s watches. Pulling out and rotating the crown provides intuitive control over various functions.
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.
Stainless steel resin case
The case of the watch is made of stainless steel and resin.
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 Casio G-Steel Solar Bluetooth GST-B100-1AER (36)
I bought this model and I’m very happy with my choice. This product from the well-known Casio brand has a reputation for being durable and able to withstand various conditions. What I appreciate most about it is the black rubber strap, which is comfortable and works great for everyday use. The watch’s design is modern yet sturdy, which is typical of this manufacturer. Wearing it gives me confidence and satisfaction. The purchase at the store went smoothly. I recommend it to anyone looking for a practical and stylish everyday watch.
Robi
1/4/26
100%
I'll definitely come back here.
Bartosz.K.
12/27/25
100%
I bought this watch as a 40th birthday gift. The solar-powered movement works flawlessly. It’s a great option for a gift. I highly recommend it.
Laura M.
12/27/25
100%
I gave this watch as a gift for a special anniversary. The black rubber strap is both practical and stylish. It’s a well-made product that lived up to my expectations. I highly recommend it.
Pijanka
12/21/25
100%
It's worth buying—you'll be completely satisfied.
Elka.Elka
12/19/25
100%
I bought a model inspired by the legendary G-SHOCK. I like the yellow rubber strap. The order arrived quickly. A plus for its availability in physical stores. I'm happy with my purchase.
Dariusz - FUX
12/11/25
100%
Great quality, on-time delivery.
Men
3/5/24
100%
Buying this G-SHOCK watch was a great decision! The Japanese solar-powered movement with the Casio 5513 caliber works flawlessly—I wear it every day, and the battery is always fully charged. A big advantage is that I don’t have to worry about replacing the battery. Plus, same-day delivery in Warsaw was a huge convenience for me. I recommend it to anyone looking for a reliable and durable watch!
Walenty E.
2/28/24
100%
Everything's great
Ewa Y.
1/26/23
100%
He's a badass.
Slk
4/13/21
100%
A gift from my wife for the 30th birthday. The mega watch itself was sick with it for 2 years. Solar mechanism, bluetooth, full led. A combination of modern and classic. I recommend.
Mateusz
4/13/21
100%
A gift from my wife for my 30th birthday. I’d been really wanting this watch for about two years. It has a solar-powered mechanism, Bluetooth, and full LED display. It’s a blend of modern and classic styles. I highly recommend it.
Mateusz
3/30/20
100%
The dial looks very stylish and the whole thing works perfectly. No function was found here by accident. I am satisfied with this purchase and service of the store. : D
Daniel
3/30/20
100%
The watch looks really stylish, and it works perfectly. Every feature is there for a reason. I'm very happy with this purchase and the store's service. :D
Daniel
12/5/19
100%
I received my watch today. Very well packed, professional engraving. The waiting time is not very long, about 3 days (including the pre-holiday period and the engraving service). I superficially rate the product as perfect! It looks beautiful, a combination of classic and modern in one. I won't find out about the functionality until December 24, when my husband checks it himself. I recommend!
Anita
12/5/19
100%
I received the watch today. It was very well packaged, and the engraving looks professional. The wait wasn’t too long—about 3 days (including the pre-holiday rush and the engraving service). At first glance, I’d rate the product as perfect! It looks beautiful—a blend of classic and modern styles in one. I won’t know about its functionality until December 24, when my husband tries it out himself. I highly recommend it!
Anita
8/28/19
100%
He is great! A very successful model of the g-shock. The multitude of functions is impressive considering they are all very precise. I have tested the watch in many situations and I will tell you that I am very pleased. : D
Batman
8/28/19
100%
It's awesome! A really great G-Shock model. The sheer number of features is impressive, especially considering how precisely they all work. I've already put this watch through its paces in all kinds of situations, and I have to say I'm super happy with it. :D
Batman
4/8/19
100%
I can't get enough of it
Mateusz
4/8/19
100%
I can't get enough of it
Mateusz
4/4/19
100%
I also got a watch from my wife for my 40th birthday. A beautiful watch. It looks great and is perfectly made.
Robert
4/4/19
100%
My wife also gave me a watch for my 40th birthday. It’s a beautiful watch. It looks great and is beautifully crafted.
Robert
3/2/19
100%
My wife gave me the watch for my birthday after I looked at similar G-Shock models and I must say that I am very happy with this gift. It looks even better live than in the photos. It shows its elegance and sporty character.
Damian
3/2/19
100%
My wife gave me this watch for my birthday after I’d been looking at similar G-Shock models, and I have to say I’m really happy with this gift. It looks even better in person than it does in the photos. It really shows off its elegance and sporty character.
Damian
2/12/19
100%
Husband very pleased. :) and this is an important opinion. The transaction itself went extremely smoothly.
KLAUDIA
2/12/19
100%
My husband is very happy. :) And that's what matters. The transaction itself went extremely smoothly.
KLAUDIA
2/6/19
100%
The watch I've been dreaming of since it came on the market. Now I am a happy user of this watch and I am very happy. I recommend it to anyone who likes elegance with a sporty flair.
Bobo
2/6/19
100%
This is the watch I've been dreaming of ever since it hit the market. Now I'm a happy owner of this watch, and I'm absolutely thrilled with it. I recommend it to anyone who appreciates elegance with a sporty edge.
Bobo
1/22/19
100%
Steel case + elastic strap = perfect This is what I was looking for!
Grzegorz Latoszek
1/22/19
100%
Steel case + flexible strap = perfect
This is exactly what I was looking for!
Grzegorz Latoszek
1/17/19
100%
An excellent multifunctional watch that is not only incredibly useful but also nice to hang on the eye.
Mariuszek
1/17/19
100%
An excellent multifunctional watch that’s not only incredibly useful but also a pleasure to look at.
Mariuszek
12/4/18
100%
A decent brand and a decent watch, I'm really happy and the watch is great.
krzyś
12/4/18
100%
A reputable brand and a quality watch—I'm really happy with it, and the watch is great.
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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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