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

Digital-analogue outdoor watch in a black colour variant, featuring a carbon fibre bezel. Carbon Core Guard technology enhances shock resistance and protection against mud and dust, while 20 bar water resistance expands its use to swimming and diving without scuba gear. The watch is equipped with Quad Sensor, Bluetooth, and features to aid navigation and activity monitoring in the field.

Accurate timekeeping is ensured by a quartz movement with an accuracy of ±15 seconds per month, powered by a CR2025 battery providing approximately 2 years of operation. The Bluetooth module allows you to connect the watch to your smartphone, enjoy automatic time synchronisation, and access additional functions via the Casio Watches app. The app enables you to change settings, use world time, save routes, and activate the phone finder function.

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

• digital compass – determines direction in 16 points with a measurement range of 0–359 deg.; north is indicated by the hand; magnetic declination correction is possible
• altimeter – measures altitude from -700 to 10,000 metres, allows storage of 14 manual readings, and automatically logs total ascents and descents
• barometer – monitors air pressure within the range 260–1100 hPa, displays trend graph, and notifies you in case of sudden weather changes
• thermometer – records ambient temperature from -10 to +60 deg. C
• pedometer – fitted with a 3-axis acceleration sensor, records up to 999,999 steps

Additional field features become available through the app: Mission Log, which automatically records your route and altitude profile, and Location Indicator – after saving coordinates on the map, the second hand points towards your target and the display shows the distance.

20 bar water resistance allows submersion up to 200 m deep. Buttons with sealing and internal filters minimise the impact of mud, dust, and small debris on the movement. The casing is shock resistant and designed for intensive use in demanding conditions.

The case, measuring 55.4 × 51.3 × 19.4 mm, is made of carbon-fibre-reinforced resin. The Carbon Core Guard structure adds rigidity, effectively protecting the movement from stress. The carbon bezel is built from three layers of resin with carbon fibre inserts, and a transparent outer layer reveals the carbon structure inside. The dial is protected by spherical mineral glass, while time is displayed using three hands and a negative digital display. Functions are operated via side buttons, and the hand shift function facilitates reading data from the display.

The dual-level LED Super Illuminator backlight lights up both the dial and digital display. Auto Light automatically activates the illumination when you tilt the watch towards your face, with a lighting time that can be set to 1.5 or 3 seconds. The hands are coated with Neobrite, improving visibility in the dark.

The strap, made from flexible bio-based resin, is resistant to sweat and moisture. Carbon inserts on the inner side increase stability and improve wrist fit. The metal buckle offers adjustment within a 145–215 mm range.

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

• Carbon Core Guard construction
• carbon bezel with carbon fibre inserts
• resistant to shocks, mud, and dust
• 20 bar water resistance
• digital compass
• altimeter up to 10,000 m
• barometer with pressure change warning
• thermometer from -10 to +60 deg. C
• pedometer
• Bluetooth connectivity
• compatible with Casio Watches app
• Mission Log and Location Indicator functions
• Super Illuminator backlight
• hands coated with Neobrite
• spherical mineral glass
• world time, stopwatch, countdown timer, and alarms
• bio-based resin strap