Basic Information

  • Case size (L× W× H)

    55.4 × 51.3 × 19.4 mm

  • Weight

    92 g

  • Case and bezel material

    Carbon / Resin　

  • Band

    Resin Band

  • Construction

    Shock Resistant
    Mud Resistant
    Carbon Core Guard structure

  • Water resistance

    200-meter water resistance

  • Time adjustment

    Bluetooth: Connects to a smartphone and automatically adjusts the time

  • Power supply and battery life

    Approx. battery life: 2 years on CR2025

  • Sensor feature

    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
    Altimeter Measuring range: -700 to 10,000 m (-2,300 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 (±100 m /±1000 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 (±10 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 ±0.1 hPa. *Changeover between hPa and inHg
    Digital compass Measures and displays direction as one of 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 calibration, figure eight calibration, auto calibration)
    Thermometer Measuring range: -10 to 60℃ (14 to 140℉) Measuring unit: 0.1℃ (0.2℉) *Changeover between Celsius (℃) and Fahrenheit (℉)

Smartphone Link/App Connectivity Features

  • Smartphone Link feature

    Mobile link (Wireless linking using Bluetooth®)

  • Apps

    CASIO WATCHES

  • App connectivity feature

    Auto time adjustment
    Easy watch setting
    Approximately 300 world time cities
    Life log data
    Mission log
    Location Indicator
    Location Memory
    Mode/Display switching customization
    Auto altitude correction
    Phone finder

Exterior

  • Glass

    Mineral Glass
    Spherical Glass

  • Other

    Neobrite

Watch Features

  • World time

    World time 38 time zones (38 cities + coordinated universal time), daylight saving on/off, Home city/World time city swapping

  • Sunrise/sunset display

    Sunrise, sunset time display Sunrise time and sunset time for specific date

  • Stopwatch

    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

  • Timer

    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)

  • Alarm/hourly time signal

    5 daily alarms
    Hourly time signal

  • Light

    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)

  • Light color

    LED:White

  • Calendar

    Full auto-calendar (to year 2099)

  • Mute feature

    Button operation tone on/off

  • Accuracy

    Accuracy: ±15 seconds per month (with no mobile link function)

  • Other features

    12/24-hour format
    Hand shift feature
    Regular timekeeping: Analog: 3 hands (hour, minute (hand moves every 10 seconds), second) Digital: Hour, minute, second, am/pm, month, date, day


    Part of the G-Shock Mudmaster Series, the GG-B100-1ADR is built to endure harsh, debris-filled environments using durable carbon materials. Its carbon-reinforced case resists damage and deformation while providing exceptional airtightness and shock protection. Equipped with a mud-resistant filter, a stainless steel panel back, and a shock-resistant resin back cover with glass fibers, it offers superior defense against dust and mud. The bezel’s triple-layer resin with carbon fiber accents mimics the look of an off-road fuel can. Packed with features like a compass, altimeter/barometer, thermometer, and pedometer, plus smart app connectivity for easy time correction and the Mission Log function, this watch empowers swift decisions and precise action in tough conditions.