Casio G-Shock Master of G GG-B100X-1AER

Designed for the fearless adventurer and those who live in harmony with nature, the Master of G MUDMASTER is a rugged and tireless timepiece, featuring a durable carbon case and bezel and environmentally friendly materials.

Part of the G-SHOCK Master of G line, developed for professionals working in the most extreme environments, the MUDMASTER is engineered to withstand the harshest land conditions, earning the trust of rangers and rescue teams.

The GG-B100 MUDMASTER uses high-rigidity carbon to ensure shock resistance, prevent deformation, and maintain excellent airtightness. It features a mud filter, a stainless steel case back, and an internal resin structure reinforced with glass fibers, providing effective protection against dust and debris. The bezel, composed of three layers of resin with carbon fiber inserts, also recalls the design of off-road fuel canisters, a symbol of resistance and functionality. The main resin components of the case and strap are made from bio-based material, derived from renewable resources, contributing to reducing environmental impact.

Highly functional, it integrates a digital compass, altimeter/barometer, thermometer, and step counter. Through the CASIO WATCHES app, you can easily synchronize the time and access advanced functions such as the Mission Log, which records altitude and route.

A reliable ally in any situation, designed for quick decisions and tackling every challenge without hesitation.

Basic Information
Case size: 55.4 × 51.3 × 19.4 mm
Weight: 93 g
Case and bezel material: bio-based resin
Strap: bio-based resin
Structure: shock resistant, mud resistant, Carbon Core Guard
Water resistance: up to 20 bar

Time Adjustment
Bluetooth®: smartphone link with automatic time adjustment

Battery
Life: approximately 2 years on CR2025

Sensors and Functions
Step Counter: 3-axis sensor, count from 0 to 999,999 steps, automatic power saving mode

Altimeter:
Range: -700 to 10,000 m
Unit: 1 m / 5 ft
Functions: altitude differential graph with hand, memory for up to 14 records, automatic data (min/max altitudes, cumulative ascents/descents), relative altitude values, selectable interval 5 sec or 2 min

Barometer:
Range: 260 – 1,100 hPa
Unit: 1 hPa
Functions: pressure differential indication ±10 hPa, trend graph (20 or 56 hours), pressure change alarm

Digital Compass:
Directions: 16
Range: 0° – 359°
Unit: 1°
Functions: north indication with hand, magnetic declination correction, calibration (2-point, 8-point, automatic)

Thermometer:
Range: -10 to 60 °C
Unit: 0.1 °C

Connectivity and App
Mobile Link: wireless connection via Bluetooth®
App: CASIO WATCHES
Functions: automatic time adjustment, simplified settings, world time (approx. 300 cities), Life Log, mission log, location indicator, Location Memory, display customization, automatic altitude calibration, phone finder

Exterior
Glass: spherical mineral
Adjustable strap: 145 to 215 mm
Details: Neobrite, carbon fiber bezel

Watch Functions

World Time:
38 time zones (38 cities + UTC), daylight saving on/off, quick swap of local/world time

Sunrise and Sunset:
display of sunrise and sunset times for specific date

Stopwatch:
1/100 sec (up to 60 min), 1 sec (over 60 min)
Maximum duration 23:59:59
Modes: elapsed time, split time, 1st and 2nd place

Timer:
countdown up to 24 hours
Settings from 1 second to 24 hours

Alarms and Signals:
5 daily alarms
Hourly time signal
Button tones on/off

Illumination:
dual LED Super Illuminator
Selectable duration 1.5 or 3 seconds
White LED color

Calendar:
full auto-calendar up to 2099

Accuracy:
±15 seconds per month (without Mobile Link)

Other Features:
12/24 hour format
Hand shift feature
Analog (hours, minutes) and digital (hour, minute, second, am/pm, month, date, day) display