Great watch, so far works without any problems. At this price, it offers a lot of additional functions. Although it is quite large, it looks good on the wrist. I definitely recommend it.
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The modern premium Mudmaster watch from the Master of G. The rugged design ensures that it is resistant to splashes of mud and sand, and the water resistance of 20 bars allows the watch to be submerged to a depth of 200 meters.

A Miyota quartz movement powered by a replaceable battery, which provides 2 years of continuous operation, is responsible for precise timekeeping. The dial with hands and the display provide digital-analog time reading. Neobrite LED backlighting and the covering of the dial and hands with fluorescent material allow the watch to be operated in low light or no light at all.
The envelope consists of scratch-resistant mineral glass and a Carbon Core Guard case made of carbon-reinforced resin. The materials used, combined with G-Shock technology, give the watch high shock and impact resistance.
Comfortable wearing on the wrist is ensured by a strap made of flexible plastic, fastened with a metal buckle. The material used is resistant to the harmful effects of moisture and sweat, making it ideal for various activities.
The Mudmaster GG-B100Y-1AER is equipped with a number of sensors:
- digital compass - direction sensor detecting magnetic north,
- barometric altimeter - detects changes in atmospheric pressure, based on which it calculates altitudes up to 10000 meters,
- barometer - measures air pressure in the range of 260 - 1100 hPa, and the graph of pressure changes shown on the display allows early detection of weather changes,
- thermometer - measures ambient temperature in the range of -10 to +60 degrees C and indicates the result on the display,
- pedometer - a 3-axis accelerometer counts the steps taken and indicates their number on the display.

Thanks to the Bluetooth system, the watch can be connected to the Casio Watches app on your phone, thus gaining access to the following functions:
- Mission Log - when the mission log function is activated, the route traveled and altitude will be continuously recorded using the phone's GPS, allowing you to later view the information on the map available in the app; photos taken along the route are also saved in the mission log,
- Location Indicator - after saving the location in advance, the watch will indicate the distance and direction to the indicated point,
- Phone Finder - allows you to find a smartphone paired with the watch that is within a range of 2 meters,
- local city selection - allows you to quickly adjust the time and sunrise and sunset times to your current location from among 300 available cities, including Warsaw,
- automatic time setting - 4 times a day the watch connects to your phone to update the time,
- personalization - allows you to change the data visible in the watch's menu.
Basic functions:
- stopwatch,
- timer,
- 5 alarms with snooze function,
- 12/24 format,
- automatic calendar,
- sunrise/sunset indicator,
- world time,
- battery change indicator,
- backlighting of the dial and display.
Specifications
Color: Black
Mechanism: quartz Miyota
Time format: 12/24
Envelope: resin, carbon
Glass: mineral
Strap: plastic
Water resistance: 20 atm (200 m)
Envelope dimensions: 55.4 x 53.1 mm
Thickness of the envelope: 19.3 mm
Maximum strap circumference: 220 mm
Weight: 92 g
Manufacturer: Casio, Japan
MILITARY is a premium dealer of Casio.
Casio is a Japanese brand founded in 1946, known worldwide as one of the leaders in consumer electronics. A breakthrough moment in the company's history was the launch of the G-Shock series in the 1980s, which gained cult status thanks to its exceptional resistance to shocks, water, and extreme environmental conditions. Casio is constantly developing its technologies, introducing features such as Tough Solar - a solar power system - and Wave Ceptor - time synchronization using radio waves, which ensures precision and reliability. The brand's watches are popular among both professionals and users looking for durable solutions for everyday use and outdoor activities. The first G-Shock model – DW-5000C, designed by engineer Kikuo Ibe in 1983, passed a drop test from the tenth floor and continued to function flawlessly, which became the foundation of the series' legend. Today, Casio is synonymous with innovation, reliability, and timeless design.
| Gender | Men's |
|---|---|
| Smartwatch | No |
| Body material | carbon fiber |
| Type of mechanism | Quartz |
| Watch power supply | Battery CR2025 |
| Strap | Plastic |
| Glass | Polycarbonate |
| Alarm | Yes |
| Date stamp | Yes |
| Stopwatch | Yes |
| Backlight | Yes |
| Waterproof | 20 ATM / 200 m |
| Shockproof | Yes |
| NFC | No |
| Calendar | Yes |
| Compass | Yes |
| GPS | No |
| Barometer | Yes |
| Thermometer | Yes |
| Altimeter | Yes |
| Chronograph | No |
| Pedometer | Yes |
| Calorie counter | No |
| Heart rate measurement | No |
| Pulse oximeter | No |
| Weight | 92 g |
| EAN | 4549526344015 |
| Manufacturer code | GG-B100Y -1AER |
| Brand | Casio |
| EAN |
Reviews with photos
Number of reviews: 3
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This is an advanced and well-equipped watch. The carbon fibre bezel fits very well with the whole and looks great in person. Despite its large size, it is very comfortable.
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An excellent watch for outdoor use. It has many useful features and a solid, damage-resistant construction. Very durable equipment. Despite its large size, it is comfortable to wear.
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