Casio G-Shock Mudmaster GG-B100XM-1AER Watch

Digital-analog outdoor watch in a black shade, featuring a silver stainless steel bezel. The Carbon Core Guard construction provides enhanced resistance to shocks, mud, and dust, while 20 bar water resistance lets you use it for swimming and recreational diving. The model comes equipped with Quad Sensors, Bluetooth connectivity, and navigation-oriented functions as well as activity tracking capabilities for outdoor use.

The watch runs on a quartz movement with ±15 seconds per month accuracy, powered by a CR2025 battery that ensures up to 2 years of operation. Bluetooth connectivity allows pairing with your smartphone, automatic time synchronization, and access to the extended features of the Casio Watches app. App features include setting adjustments, world time, route recording, and phone finder.

The Mudmaster GG-B100XM-1AER is equipped with a Quad Sensor suite:

• digital compass — displays direction in 16 points within a 0–359 degree range, points north with an indicator, and accounts for magnetic declination correction
• altimeter — measures altitude from -700 to 10,000 meters, stores up to 14 manual readings, and automatically logs ascents and descents
• barometer — tracks atmospheric pressure from 260 to 1100 hPa, displays changes on a graph, and signals sudden weather shifts
• thermometer — measures ambient temperature from -10 to +60 degrees Celsius
• step counter with a 3-axis accelerometer, capable of recording up to 999,999 steps

Connected to the app, you get two handy outdoor features: Mission Log, which automatically records your route along with an elevation profile, and Location Indicator, where after marking a point on the map, the second hand shows the direction and the display indicates the distance to your destination.

Water resistance up to 20 bar allows you to submerge the watch to 200 meters. Special button seals and internal filters limit penetration of mud, dust, and fine particles into the mechanism. The design protects against impacts, ensuring reliable use even under extreme conditions.

The case, measuring 55.4 × 51.3 × 19.4 mm, is made of resin reinforced with carbon fiber. Carbon Core Guard construction boosts the housing's durability, protecting the movement from deformation. The forged stainless steel bezel features a multi-faceted design with a matte, brushed finish that reduces light reflections and minimizes visible scratches. The dial is protected by spherical mineral glass, and time is indicated by three hands along with a negative digital display. Functions are controlled via side buttons, and a hand-shifting mechanism allows easy viewing of the digital readouts.

Dual Super Illuminator LED backlighting brightens both the dial and the digital display. The Auto Light function automatically activates the light when you turn the watch toward your face, with a selectable lighting duration of 1.5 or 3 seconds. The hands are coated with Neobrite fluorescent material for improved readability after dark.

The strap is crafted from flexible bio-based resin that resists moisture and sweat. Carbon reinforcements on the inner side enhance stability and provide a better fit to the wrist. The metal buckle allows adjustment from 145 to 215 mm.

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

• Carbon Core Guard construction
• forged stainless steel bezel
• shock, mud, and dust resistance
• 20 bar water resistance
• digital compass
• altimeter up to 10,000 m
• barometer with pressure alarm
• thermometer from -10 to +60 deg. C
• step counter
• Bluetooth connectivity
• works with Casio Watches app
• Mission Log and Location Indicator features
• Super Illuminator backlight
• Neobrite-coated hands
• spherical mineral glass
• world time, stopwatch, countdown timer, and alarms
• bio-based resin strap