Casio G-Shock - GWG-B1000-1A3 - Mudmaster

The GWG-B1000-1A3 brings an olive-green band and tan dial accents to the G-SHOCK Master of G MUDMASTER. Its black exterior combines metal components and bio-based resin in a design built for demanding outdoor conditions.

Carbon Core Guard construction works with shock, mud and vibration protection. A screw-lock crown and protected buttons help keep out mud and dust, while anti-reflective sapphire crystal and automatic illumination keep the displays readable.

The Triple Sensor measures direction, altitude, atmospheric pressure and temperature. Bearing memory, altitude records and pressure-trend alerts provide useful detail when conditions change. The CASIO WATCHES app adds Location Indicator, Mission Log, automatic altitude correction and convenient watch settings.

Tough Solar charging, Multi Band 6 radio synchronization and Bluetooth time adjustment support reliable daily timekeeping. The specifications below include the measurement ranges, memory capacities and operating limits.

Technical Details

• Model: GWG-B1000-1A3
• Size of case: 58.7 x 52.1 x 16.2 mm 
• Weight: 114g
• Case and bezel material: Resin (bio-based) / Stainless steel
• Bio-based resin band
• Compatible band size: 145 to 215 mm
• Shock resistant
• Vibration resistant
• Mud Resistant
• Carbon Core Guard structure
• 200 meter Water Resistance
• Radio-controlled Watch; Multi band 6
• Tough Solar (Solar powered)
• Sapphire crystal with anti-reflective coating
• Screw Lock Crown
• DLC treatment on the stainless-steel portions
• Black ion plated bezel
• Neobrite
• Compass function: 
• 16 direction / direction angle (0 to 359°) measured, direction continuous measurement (60 seconds), north direction guideline function. 
• Bearing memory function. Automatic horizontal, magnetic declination, and orientation correction function.
• Barometric pressure measurement function 
  (measurement range: 260~1,100hPa (7.65~32.45inHg), 1hPa (0.05inHg)), 
• Barometric pressure trend graph display (past 20 hours displayed), pressure difference indicator (±10hPa) 
• Barometric pressure trend information alarm (when a characteristic change in air pressure occurs, it will be notified by arrows and sound notification) 
• The pressure trend graph can be changed to measurement every 30 minutes. 
• That's for the last 5 hours.
  *Changeover between hPa and inHg
• Altitude measurement function/relative altimeter
  (measurement range: -700 to 10,000 m (-2,300 to 32,800 ft), in units of 1 m (5 ft)) 
• Advanced memory (up to 30 manual memories of measurement date, month, time, and altitude), 
• Automatic recording data (highest/lowest altitude, auto accumulation (ascent/descending) memory) 
• Altitude trend graph, altitude difference indicator (±100 m/ ±1,000 m) 
• Measurement interval setting function (every 5 seconds / 2 minutes) 
  *Every 1 second for the first 3 minutes only
  *Changeover between meters (m) and feet (ft)
• Temperature measurement function
  (measurement range: -10 to 60 °C (14 °F to 140 °F), 0.1 °C (0.2 °F)) 
  *Changeover between Celsius (℃) and Fahrenheit (℉)
• Mobile link (Wireless linking using Bluetooth®)
• APPS: Casio Watches
• App Connectivity feature:
• Auto time adjustment
• Easy watch setting
• Approximately 300 world time cities
• App information
• Time & place
• Mission log
• Location Indicator
• Location Memory
• Mode/Display switching customization
• Auto altitude correction
• Phone finder
• World time
• 38 time zones (55 cities + coordinated universal time), daylight saving on/off, auto summer time (DST) switching, Home city/World time city swapping
• Sunrise, sunset time display
• Sunrise time and sunset time for specific date
• 1/100-second stopwatch
• Measuring capacity: 23:59'59.99''
• Measuring modes: Elapsed time, split time, 1st-2nd place times
• Countdown timer
• Measuring unit: 1 second
• Countdown range: 60 minutes
• Countdown start time setting range: 1 minute to 60 minutes (1-minute increments)
• 5 daily alarms
• Hourly time signal
• Double LED light; white LEDs
• LED light for the face (Full auto LED light, Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
• LED backlight for the digital display (Full auto LED light, Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
• Full auto-calendar (to year 2099)
• Mute Feature: Button operation tone on/off
• The auto hand home position correction
• Power Saving (display goes blank and hands stop to save power when the watch is left in the dark)
• Battery level indicator
• Approx. battery operating time:
• 6 months on rechargeable battery (operation period with normal use without exposure to light after charge)
• 24 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)
• Accuracy: ±15 seconds per month (with no signal calibration and mobile link function)
• Other features:
• 12/24-hour format
• Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.)
• Regular timekeeping:
• Analog: 3 hands (hour, minute (hand moves every 10 seconds), second), 
• 2 dials
• Digital: Hour, minute, second, pm, month, date, day
• Time Calibration Signals
• Station name: DCF77 (Mainflingen, Germany)
  Frequency: 77.5 kHz
• Station name: MSF (Anthorn, England)
  Frequency: 60.0 kHz
• Station name: WWVB (Fort Collins, United States)
  Frequency: 60.0 kHz
• Station name: JJY (Fukushima, Fukuoka/Saga, Japan)
  Frequency: 40.0 kHz (Fukushima) / 60.0 kHz (Fukuoka/Saga)
• Station name: BPC (Shangqiu City, Henan Province, China)
  Frequency: 68.5 kHz
• Time calibration signal reception
• Auto receive up to six* times a day (remaining auto receives canceled as soon as one is successful)
  *5 times a day for the Chinese calibration signal
• Manual receive
• The latest signal reception results