Casio G-Shock Mudmaster GG-B100X-1AER Watch

Digital-analog outdoor watch in a black color variant, featuring a carbon fiber bezel. Carbon Core Guard technology increases resistance to shocks, mud, and dust, while 20 bar water resistance expands functionality to include swimming and diving without scuba gear. The watch is equipped with Quad Sensor technology, Bluetooth, as well as navigation aids and tools for monitoring outdoor activity.

Accurate timekeeping is maintained by a quartz movement with ±15 seconds accuracy per month, powered by a CR2025 battery that lasts for about 2 years. The Bluetooth module allows you to pair the watch with your smartphone, automatically sync the time, and take advantage of extra features available in the Casio Watches app. The app lets you change settings, manage world time, record routes, or use the phone finder feature.

Mudmaster GG-B100XM-1AER is equipped with an advanced Quad Sensor suite:

• digital compass – shows direction in 16 points, measurement range 0–359 degrees, north indicated by the hand, magnetic declination adjustment possible
• altimeter – measures from -700 to 10,000 meters, records 14 manual readings and automatically logs total ascent and descent
• barometer – monitors pressure in a range of 260–1100 hPa, displays a trend graph, sounds an alert for sudden weather changes
• thermometer – records ambient temperature from -10 to +60 degrees Celsius
• step counter – with a 3-axis accelerometer, tracks up to 999,999 steps

Paired with the app, you unlock additional outdoor features: Mission Log, which automatically records your route and elevation profile, and Location Indicator – after saving coordinates on the map, the second hand points toward your destination, and the display shows remaining distance.

20 bar water resistance enables submersion to 200 m depth. Sealed buttons and internal filters minimize the impact of mud, dust, and small particles on the mechanism. The casing is shock resistant and designed for heavy use in tough conditions.

The case measures 55.4 × 51.3 × 19.4 mm and is made from carbon fiber-reinforced resin. The Carbon Core Guard structure reinforces the whole assembly, reliably protecting the movement from stress. The carbon bezel is built from three layers of resin featuring carbon fiber inserts; the transparent outer layer highlights the carbon structure inside. The dial is shielded by spherical mineral glass and displays time with three hands and a negative LCD. Functions are controlled via side buttons, while a hand shift feature makes it easier to read the display.

The LED Super Illuminator two-level backlight illuminates both the dial and the digital display. Auto Light automatically activates lighting when you turn the watch toward your face, with lighting duration selectable at 1.5 or 3 seconds. The hands are coated with Neobrite material for improved night visibility.

The band is crafted from flexible bio-based resin that resists sweat and moisture. Carbon inserts on the inside provide added stability and improve fit on the wrist. A metal buckle lets you adjust the fit from 145–215 mm.

• watch
• original manufacturer’s packaging
• user manual
• warranty card

• Carbon Core Guard construction
• carbon bezel with carbon fiber inserts
• shock, mud, and dust resistance
• 20 bar water resistance
• digital compass
• altimeter up to 10,000 m
• barometer with pressure change alarm
• thermometer from -10 to +60 degrees Celsius
• step counter
• Bluetooth connectivity
• compatible with the Casio Watches app
• Mission Log and Location Indicator functions
• Super Illuminator backlight
• hands with Neobrite coating
• spherical mineral glass
• world time, stopwatch, countdown timer, and alarms
• bio-based resin strap