Casio G-Shock Master of G Mudmaster Carbon Core Guard Structure Black Resin Band Watch GGB100Y-1A GG-B100Y-1A

Conquer tough terrain and grab attention with a rugged timepiece boasting a bold, eye-catching color scheme.

Designed to work even in the harshest environments, MASTER of G specialty watches take timekeeping to new heights with a rugged design accented in the bright yellow used for emergency rescues.

The GG-B100 MUDMASTER employs high rigidity carbon in the case to keep damage and warping at bay and ensure extreme airtightness and shock resistance. This timepiece also features 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, giving it a high level of resistance to dust and mud. The bezel also uses three layers of fine resin with carbon fiber inserts. This tough, rugged design is accented in bright bold yellow.

Practical and functional, this watch is equipped with digital compass, altimeter/barometer, thermometer and step counter. Easily correct the time using the dedicated G-SHOCK 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.

• Case / bezel material: Carbon / Resin　
• Resin Band
• Neobrite
• Mineral Glass
• Carbon Core Guard structure
• Mud Resistant
• Shock Resistant
• Spherical Glass
• 200-meter water resistance
• 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)
• LED:White
• Mobile link (Wireless linking using Bluetooth®)
• 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)
• 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 ±1 hPa.
• *Changeover between hPa and inHg
• Thermometer
• Measuring range: –10 to 60°C (14 to 140°F)
• Measuring unit: 0.1°C (0.2°F)
• *Changeover between Celsius (°C) and Fahrenheit (°F)
• 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: ±15 seconds per month (with no mobile link function)
• Approx. battery life: 2 years on CR2025
• Size of case : 55.4 × 53.1 × 19.4 mm
• Total weight : 92 g