For the fearless adventurer and nature lover, a tough and rugged Master of G MUDMASTER featuring bezel and case constructed of heavy duty carbon and environmentally responsible materials.

The watches of the G-SHOCK Master of G line, developed for professionals working in the harshest environments, come equipped with even tougher functionality. And the MUDMASTER takes this another step further with the ability to handle the roughest rubble and debris-strewn terrains, earning the appreciation and trust of rangers and rescue teams operating in extreme environments.

The MUDMASTER GG-B100X employs high rigidity carbon for the carbon fiber-reinforced case to keep damage and warping at bay and ensure a tight seal and excellent shock resistance. Featuring a filter to protect against mud, a stainless-steel panel back, and a back cover made of shock-resistant fine resin embedded with glass fibers, it provides a high level of resistance to dust and mud. The bezel also uses three layers of fine resin with carbon fiber inserts. The rugged design evokes the gasoline jerrycans mounted to off-road vehicles tough enough to traverse the most challenging terrain. Key components for the case and band are made with bio-based resin. Produced using renewable organic resources, this material is expected to help reduce environmental impact.

Practical and functional, the watch is equipped with digital compass, altimeter/barometer, and thermometer, as well as step counter. Easily correct the time using the dedicated app and tap into loads of other useful features including the Mission Log, which automatically records altitude data obtained from the watch and route data obtained by your smartphone.

You can depend on this tough timepiece to deliver what you need to make quick decisions and take decisive action.

Movement: Quartz

Power Supply and Battery Life: Approx. battery life 2 years (CR2025)

Time Adjustment: Bluetooth – connects to smartphone and automatically adjusts time

Case Length: 55.4

Case Width: 51.3

Case Height: 19.4

Weight: 93 g

Case and Bezel Material: Bio-based Carbon / Resin

Band Material: Bio-based Resin

Construction: Shock Resistant, Mud Resistant, Carbon Core Guard Structure

Water Resistance: 200-meter water resistance

Sensor Feature: Step count using 3-axis acceleration sensor (0 to 999,999 steps), Power saving auto sensor sleep after fixed period of non-activity

Altimeter: Measuring range -700 to 10,000 m, Measuring unit 1 m, Hand indication graph of altitude differential, Manual memory up to 14 records (altitude, date, time), Auto log data (high/low altitudes, cumulative ascent and descent), Relative altitude readings ±100 m / ±1000 m, Measurement interval 5 seconds or 2 minutes (1 second for first 3 minutes), Unit changeover meters and feet

Barometer: Measuring range 260 to 1,100 hPa, Measuring unit 1 hPa, Hand indication of pressure differential ±10 hPa, Atmospheric pressure tendency graph (last 20 or 56 hours), Pressure tendency alarm, Hand indication shows ±0.1 hPa units, Unit changeover hPa and inHg

Digital Compass: Measures direction in 16 points, Measuring range 0 to 359°, Measuring unit 1°, 60 seconds continuous measurement, Hand indication of north, Magnetic declination correction, Direction calibration (2-point, figure eight, auto calibration)

Thermometer: Measuring range -10 to 60℃, Measuring unit 0.1℃, Unit changeover Celsius and Fahrenheit

Functions:

• Step counter
• Altimeter
• Barometer
• Digital compass
• Thermometer
• Bluetooth time synchronization
• Power saving mode
• Atmospheric pressure tendency alarm
• Altitude memory and auto log data
• Shock resistant
• Mud resistant
• 200m water resistance