The heart of the watch is a quartz movement powered by a battery. The case of a Casio G-SHOCK Casio GW-7900B-1ER watch is made of durable and shattering-resistant plastic, which is covered by a black coating.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. The black dial is protected against shocks and scratches by a mineral crystal. Due to a water resistance of 200 meters, the watch can be worn during swimming and freediving at greater depths. Casio G-SHOCK GW-7900B-1ER 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
Full-Auto Illuminator
Automatically deactivates the Auto EL backlight function when surrounding light is sufficient, and activates it under dim light or dark conditions.
Shock-resistant
Shock-resistant construction protects against impact and vibration.
Solar Power
A solar cell provides power for operation.
Radio signal reception (EU, USA, Japan, China)
Whether in Europe, North America and Japan or in the outer reaches of Canada, Central America and China - once the watch has been set to the local time, it receives the relevant signal and shows the correct time wherever you are. In many countries, it also sets itself automatically to summer and winter time.
Moon Phase Indicator
The moon phase indicator shows the current moon phase based to the earth
Tide indicator
Once the high tide time has been entered for a selected location, the watch can display the low and high tide phases at this location on any given date. This can be quite useful, for example, if you want to know the patterns of the tides at your destination in advance.
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 min. - 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. The time can be set to the nearest seconds and up to 24 hours in advance. This model has three independent timers - ideal for people who need to take medicines every day or those who do interval training.
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.
Snooze feature
Each time you stop the alarm, it sounds again after a few minutes.
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.
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.
Resin case
The case of the watch is light and durable.
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.
Battery level indicator
An indicator shows the current battery level.
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.
I bought this watch as a Valentine's Day gift for my boyfriend. He really liked the sturdy black bracelet. The watch looks stylish and is comfortable to wear. It’s a great gift idea for a guy who likes practical gadgets. I’m very happy with my choice and recommend this store.
Niezgódka:)
1/1/26
100%
I bought this watch as a Valentine's Day gift for my boyfriend. He really likes it—it has a cool design. The store did a great job, and the free engraving is a nice bonus.
daga89
12/22/25
100%
Perfect service.
stachna01
12/12/25
100%
I bought this watch as a gift for my boyfriend, just because. I chose it because it has a cool design and is durable. My boyfriend was really happy with it because it fits his style perfectly. The order arrived quickly, and the whole process was simple and pleasant. I recommend this store and this product to everyone!
Małgorzata PI.
12/10/25
100%
I bought a G-SHOCK watch and I’m very happy with my choice. This model builds on the tradition of this well-known brand, as evidenced by its reliable quartz movement. This is what ensures the watch runs accurately and smoothly for a long time. I also really appreciate the careful, secure packaging of the shipment, thanks to which the product arrived in perfect condition. The store’s service was fast and professional, and the purchase itself went smoothly. The watch looks great and is suitable for both everyday wear and special occasions. I can wholeheartedly recommend this model and the store where I made the purchase. It was a very successful purchase that met all my expectations.
suuntomiłośnik
4/26/23
100%
I have owned the watch for 2 years and can say that it is trouble-free. The battery recharges itself and even on gloomy winter days the battery always stays high. It has passed many falls, from which it has always emerged unscathed. I really like the automatic radio synchronization, which makes the watch always very accurate. The only downside is the screws on the top, which are a push-on dummy.
Filip
4/26/23
100%
I have this watch 1.5 years has gone through quite a lot with me. Both crawling in the mud and swimming with a tube are not terrible to it, as well as shocks. Radio synchronization works flawlessly. Nice, even illumination of the entire watch face. The only small drawback is the poor visibility of the indications on sunny days of the so-called negative version.
Mały
4/26/23
100%
Compared to previous watches I've had, even outdoor but non-factory watches, this is in a completely different class. The previous watch I bought from Decathlon, fell apart after 2 months. This one is holding strong.
Maciej
2/3/19
100%
I have the watch for 2 years and it can be said that it is trouble-free. The battery charges itself and is always at a high level even on gloomy winter days. He had many falls, and he always came out alive. I really like the automatic radio synchronization which makes the watch always very accurate. The only downside is the screws at the top, which are a press-on dummy.
Filip
2/3/19
100%
I have a watch for 2 years and it can be said that it is trouble-free. The battery recharges itself and is always at a high level even on gloomy winter days. He had many falls, and he always came out alive. I really like the automatic radio synchronization which makes the watch always very accurate. The only downside is the screws at the top, which are a snap fit.
Filip
11/2/18
100%
I have this watch 1.5 years it has been with me a lot. Both crawling in the mud and swimming with a snorkel are not afraid of him, as well as shocks. Radio synchronization works flawlessly. Nice, even illumination of the entire watch face. The only slight disadvantage is the poor visibility of indications on sunny days, the so-called negative version.
Mały
11/2/18
100%
I have this watch 1.5 years it has been with me a lot. Both crawling in the mud and swimming with a snorkel are not afraid of him, as well as shocks. Radio synchronization works fine. Nice, even illumination of the entire watch face. The only slight downside is the poor visibility of indications on sunny days, the so-called negative version.
Mały
11/11/14
100%
Compared to previous watches I have had, even the outdoor ones but not the company ones, this is a very different class. I bought an earlier watch in Decathlon, it fell apart after 2 months. This one is holding tight.
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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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