Video Overview
Made with Real Carbon Fiber
The GG-B100 G-Shock Mudmaster uses real carbon fiber in what they call the Carbon Core Guard Structure. The idea is an airtight case that protects the modules and filters against the protrusion of mud.

Mud, Dust and Shock Resistant
The G-Shock Mudmaster was designed and engineered to withstand rough land environments.ย The case is made of high-rigidity carbon material to protect against damage and deformation due to impact and other rough treatment, while metal button pipes ensure a tighter seal against the external environment. A filter further protects against the invasion of mud, for the high level of dust and mud resistance required when in severe environments. In addition, the dual back cover consists of a stainless steel panel back and an outer cover made of shock-resistant fine resin embedded with glass fibers. The bezel is formed of three layers of fine resin with carbon fiber inserts. The top layer is transparent, resulting in a bezel that shows the embedded carbon material.

Technology Out The Wazoo
This may be as smart as a non-smartwatch gets. The Mudmasterย has quad sensors that can do the following on the dial:
- Thermometer
- Barometer
- Altimeter
- Digital Compass
- Step Counter
It has a super illuminator using a high brightness LED so you can see in the dark.
Finally, it has Bluetooth to connect to your phone through the G-SHOCK Connected app (iOS and Android). The app allows you to extend the capability of your watch even further.

Full Specifications
- Shock Resistant
- Mud Resistant
- Carbon Core Guard structure
- Mineral Glass
- Spherical Glass
- Neobrite
- 200-meter water resistance
- Case / bezel material: Carbon / Resinใ
- Resin Band
- Double LED light
LED light for the face (Auto LED light, Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
LED backlight for the digital display (Auto LED light, Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
- Mobile link (Wireless linking using Bluetoothยฎ)
- Digital compass
Measures and displays direction as one of 16 points
Measuring range: 0 to 359ยฐ
Measuring unit: 1ยฐ
60 seconds continuous measurement
Hand indication of north
Magnetic declination correction
Direction calibration (2-point calibration, figure eight calibration, auto calibration)
- Altimeter
Measuring range: โ700 to 10,000 m (โ2,300 to 32,800 ft.)
Measuring unit: 1 m (5 ft.)
Hand indication graph of altitude differential
Manual memory measurements (up to 14 records, each including altitude, date, time)
Auto log data (High/low altitudes, cumulative ascent and descent)
Others: Relative altitude readings (ยฑ100 m /ยฑ1000 m), selectable measurement interval: 5 seconds or 2 minutes (1 second for first 3 minutes only)
*Changeover between meters (m) and feet (ft)
- Barometer
Measuring range: 260 to 1,100 hPa (7.65 to 32.45 inHg)
Measuring unit: 1 hPa (0.05 inHg)
Hand indication of pressure differential (ยฑ10 hPa)
Atmospheric pressure tendency graph (last 20 hours or last 56 hours)
Barometric pressure tendency information alarm (beep and arrow indicates significant changes in pressure)
The atmospheric pressure tendency graph can show the last 20 minutes or last 56 minutes of measurements. The hand indication of pressure differential shows values in units of ยฑ1 hPa.
*Changeover between hPa and inHg
- Thermometer
Measuring range: โ10 to 60ยฐC (14 to 140ยฐF)
Measuring unit: 0.1ยฐC (0.2ยฐF)
*Changeover between Celsius (ยฐC) and Fahrenheit (ยฐF)
- Step count using a 3-axis acceleration sensor: 0 to 999,999 step count display range
Power Saving: Auto sensor sleep state entry after fixed period of non-activity
- World time
38 time zones (38 cities + coordinated universal time), daylight saving on/off, Home city/World time city swapping
- Sunrise, sunset time display
Sunrise time and sunset time for specific date
- 1/100-second stopwatch
00'00''00~59'59''99 (for the first 60 minutes)
1:00'00~23:59'59 (after 60 minutes)
Measuring unit:
1/100 second (for the first 60 minutes)
1 second (after 60 minutes)
Measuring modes: Elapsed time, split time, 1st-2nd place times
- Countdown timer
Measuring unit: 1 second
Countdown range: 24 hours
Countdown start time setting range: 1 second to 24 hours (1-minute increments and 1-hour increments)
- 5 daily alarms
- Hourly time signal
- Hand shift feature
- Full auto-calendar (to year 2099)
- 12/24-hour format
- Button operation tone on/off
- Regular timekeeping
Analog: 3 hands (hour, minute (hand moves every 10 seconds), second)
Digital: Hour, minute, second, am/pm, month, date, day
- Accuracy: ยฑ15 seconds per month (with no mobile link function)
- Approx. battery life: 2 years on CR2025
- LED:White
Dimensions
Case Size: 55.4 mm. x 53.1 mm. x 19.3 mm.
Additional Details
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Actual Item Weight: 92 grams (3.25 ounces)
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Carbon Fiber Patterns Used: Plain Weave (Checkerboard)
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Finishes Used: Glossy,
Matte
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Warranty: 1 year manufacturer warranty. We are an authorized retailer for Casio / G-SHOCK.