Casio G-Shock - GWG-B1000EC-1A
 
Features
Whatever you’re doing, wherever you are — the G-SHOCK Master of G line has your back. 
Based on GRAVITYMASTER, MUDMASTER, and MUDMAN models that deliver peak performance in punishing conditions in the air and on land, this line features a black watch case symbolizing toughness, with accents in vivid emergency colors that capture the world of professionals involved in rescue efforts and other critical missions. 
Employing a structure resistant to dust, mud, vibration, and shock, the MUDMASTER GWG-B1000EC delivers solar-powered timekeeping with Bluetooth® and radio control accuracy, Triple Sensor technology, and more. The powerful design ensures durability and a comfortable fit thanks to an inventive combination of materials that includes carbon fiber-reinforced resin*1 and forged metals. Use the Location Indicator feature to see the direction of a target destination via an indicator hand on the watch.
*1 Due to the characteristics of carbon fiber-reinforced resin, the pattern and color tone that appears on the surface will vary model by model.
 
Specifications
- Case and bezel material
 Resin (Bio-based) / Stainless steel
- Band  :  Bio-based resin band
- Glass  :  Sapphire crystal with anti-reflective coating
- Neobrite
- Shock Resistant
 
- Vibration resistant
 
- Surface treatment : DLC Coating bezel
- Mud Resistant
 
- Carbon Core Guard structure
- 200-meter water resistance
- Tough Solar (Solar powered)
- 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
 App information
 Time & place
 Mission log
 Location Indicator
 Location Memory
 Mode/Display switching customization
 Auto altitude correction
 Phone finder
- Sensor feature
 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 (℉)
 
- Time adjustment
 Radio-controlled Watch; Multi band 6
 Bluetooth: Connects to a smartphone and automatically adjusts the time
 
- Time adjustment details
 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
 
- 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 display
 Sunrise, sunset time display Sunrise time and sunset time for specific date
- Stopwatch
 1/100-second stopwatch Measuring capacity: 23:59'59.99'' Measuring modes: Elapsed time, split time, 1st-2nd place times
- Timer
 Countdown timer Measuring unit: 1 second Countdown range: 60 minutes Countdown start time setting range: 1 minute to 60 minutes (1-minute increments)
- Alarm/hourly time signal
 5 daily alarms
 Hourly time signal
- Mute feature
 Button operation tone on/off
- Hand home position correction feature
 The auto hand home position correction
- Calendar
 Full auto-calendar (to year 2099)
- 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
- Accuracy
 Accuracy: ±15 seconds per month (with no signal calibration and mobile link function)
- Light Light color  LED : White
 Double LED light 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)
- Energy saving feature
 Power Saving (display goes blank and hands stop to save power when the watch is left in the dark)
- Battery display/alert
 Battery level indicator
- Run time
 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)
 
- Case size (L× W× H)  :  58.7 × 52.1 × 16.2 mm
- Compatible band size   :  145 to 215 mm
- Weight  :  114 g