Casio G-Shock Mudmaster GG-B100X Watch -1A3ER

Digital-analog field watch in black and green color scheme, featuring a carbon fiber bezel. Carbon Core Guard construction provides high resistance to shocks, mud, and dust, and water resistance to 20 bar allows use while swimming and diving without scuba gear. The model is equipped with a set of Quad Sensor sensors, Bluetooth connectivity, and functions supporting navigation and tracking outdoor activities.

The watch operates with a quartz movement accurate to ±15 seconds per month, powered by a CR2025 battery that provides around 2 years of operation. Bluetooth connectivity enables pairing the watch with a smartphone, automatic time correction, and access to additional features via the Casio Watches app. The app lets you adjust settings, use world time, log routes, and activate the phone finder function.

The Mudmaster GG-B100XM-1AER features the Quad Sensor set:

• digital compass - indicates direction in 16 points, range 0–359 deg., north shown with the hand and magnetic declination correction
• altimeter - measures altitude from -700 to 10,000 meters, records up to 14 manual readings and an automatic log of total ascents and descents
• barometer - records pressure between 260–1100 hPa, displays a trend graph and alerts you to sudden weather changes
• thermometer - measures ambient temperature from -10 to +60 deg. C
• pedometer - with a 3-axis accelerometer, counts up to 999,999 steps

When connected to the app, two useful outdoor functions become available: Mission Log, which automatically records your route including altitude profile, and Location Indicator – after saving a point on the map, the second hand shows its direction while the display indicates the distance to your target.

Water resistance of 20 bar allows the watch to be submerged to 200 meters. Sealed buttons and internal filters limit the ingress of mud, dust, and small debris into the mechanism. The construction is also shock-resistant, making it suitable for intensive use in demanding environments.

The case measures 55.4 × 51.3 × 19.4 mm and is made from resin reinforced with carbon fiber. Carbon Core Guard construction increases case rigidity and protects the movement from deformation. The carbon bezel is made of three layers of resin with carbon fiber inserts, and the transparent outer layer reveals the carbon structure inside. The dial is protected by spherical mineral glass, with three hands and a negative digital display for readouts. Functions are operated via side buttons, and a hand-shift function eases data viewing on the display.

Dual LED Super Illuminator backlighting lights up the dial and digital display. Auto Light function activates the light when you tilt the watch toward your face, and the lighting time can be set to 1.5 or 3 seconds. The hands are coated with fluorescent Neobrite material to enhance legibility after dark.

The strap is made of flexible bio-based resin that resists moisture and sweat. Carbon components on its inner side reinforce the attachment and improve fit on the wrist. A metal buckle allows adjustment 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 alert
• thermometer from -10 to +60 deg. C
• pedometer
• Bluetooth connectivity
• supports the 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