Casio G-Shock Master of G Mudmaster GG-B100XMH-5AER

Designed to tackle the most extreme environments, it combines toughness, functionality, and sophisticated style. The carbon-fiber reinforced resin case offers high impact resistance, while the mud-resistant structure, stainless steel case back, and reinforced construction ensure excellent protection from dust and mud.

Conceived for exploration, it integrates a digital compass, altimeter/barometer, thermometer, and step tracker. Thanks to the CASIO WATCHES app, you can easily set the time and use the Mission Log, which automatically records altitude and route data.

The stainless steel bezel with a light yellow gold IP finish, brown IP details, and dark brown resin strap give it a bold and refined character, inspired by the golden horizon where earth and sky meet.

Technical Specifications

Case

Dimensions: 55.4 × 51.3 × 19.4 mm
Weight: 104 g
Case and bezel material: Bio-based carbon and stainless steel
Structure: Shock-resistant, mud-resistant, Carbon Core Guard structure
Water resistance: 20 bar (200 meters)

Power supply and battery

Power supply: CR2025 lithium battery
Battery life: Approximately 2 years

Time adjustment and connectivity

Time adjustment: Bluetooth®, with smartphone connection for automatic time adjustment
Mobile Link: Wireless connection via Bluetooth®
App: CASIO WATCHES
App functions: Automatic watch adjustment, easy watch setup, world time for approximately 300 cities, Life Log data, Mission Log, location indicator, Location Memory, mode customization and display switching, automatic altitude calibration, Phone Finder function

Sensors

Step tracker: Step count using a 3-axis acceleration sensor; display range from 0 to 999,999 steps; power saving with automatic sensor sleep state activation after a certain period of inactivity.

Altimeter: Measurement range from -700 to 10,000 m (-2,300 to 32,800 ft); measurement unit 1 m (5 ft); graph indicating altitude differential via hand; memory for manual measurements up to 14 records, each including altitude, date, and time; automatic log data with maximum and minimum altitudes, cumulative ascent and descent; relative altitude values ±100 m / ±1,000 m; selectable measurement interval of 5 seconds or 2 minutes, with 1 second available for the first 3 minutes; conversion between meters (m) and feet (ft).

Barometer: Measurement range from 260 to 1,100 hPa (7.65 to 32.45 inHg); measurement unit 1 hPa (0.05 inHg); hand indication of pressure difference ±10 hPa; atmospheric pressure trend graph for the last 20 or 56 hours; barometric trend information alarm with audible signal and arrow to indicate significant pressure changes; display of measurements for the last 20 or 56 minutes; pressure difference indication in units of ±0.1 hPa; conversion between hPa and inHg.

Digital compass: Measurement and display of direction on 16 points; measurement range from 0 to 359°; measurement unit 1°; continuous measurement for 60 seconds; north indication via hand; magnetic declination correction; 2-point direction calibration, figure-eight calibration, and automatic calibration.

Thermometer: Measurement range from -10 to 60 °C (14 to 140 °F); measurement unit 0.1 °C (0.2 °F); conversion between Celsius (°C) and Fahrenheit (°F).

Strap

Material: Bio-based resin
Adjustment range: 145 to 215 mm

Glass

Type: Spherical mineral glass

Surface treatment