The G-SHOCK Master of G series is built for those who face extreme conditions head-on. With a black case representing toughness, these watches are enhanced with striking emergency color accents, embodying the spirit of professionals in rescue operations and high-stakes missions.
Drawing on the rugged designs of the GRAVITYMASTER, MUDMASTER, and MUDMAN models, these timepieces deliver optimal performance both on land and in the air. The GRAVITYMASTER GR-B300EC, inspired by next-gen aircraft, boasts a sleek, seamless design with a Carbon Core Guard structure for superior durability. Its wide 3D face ensures clarity, while practical features like dual-time display and flight log memory make it a powerful tool for adventurers and rescuers alike.
Wherever your mission takes you, the G-SHOCK Master of G series is there to support you.
Specifications
Basic Information
Case size (L× W× H)
59 × 54.7 × 15.7 mm
Weight
71 g
Case and bezel material
Bio-based Carbon / Bio-based resin / Stainless steel
Band
Bio-based resin band
Construction
Shock 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
Tough Solar (Solar powered)
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
Flight log
Phone finder
Exterior
Glass
Mineral Glass
Crown
Screw Lock Crown
Surface treatment
Black ion plated bezel
Compatible band size
145 to 215 mm
Other
Neobrite
Watch Features
World time
Dual time (Home City time swapping)
Stopwatch
1-second stopwatch
Measuring capacity: 23:59'59.
Measuring modes: Elapsed time, split time
Timer
Countdown timer
Measuring unit: 1 second
Countdown range: 24 hours
Countdown start time setting range: 1 minute to 24 hours (1-minute increments and 1-hour increments)
Alarm/hourly time signal
Daily alarm
Light
LED light (Super Illuminator)
Afterglow
Light color
LED:White
Calendar
Full auto-calendar (to year 2099)
Energy saving feature
Power Saving (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:
5 months on rechargeable battery (operation period with normal use without exposure to light after charge)
18 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)
Accuracy
Accuracy: ±15 seconds per month (with no mobile link function)
Other features
Date display
Day indicator
Regular timekeeping:
Analog: 3 hands (hour, minute (hand moves every 10 seconds), second), 3 dials (dual time hour and minute, dual time 24-hour, day)
Features:
Emergency colors accenting a black watch face
The GRAVITYMASTER GR-B300EC incorporates vivid emergency colors like red, orange, and yellow, commonly used by rescue teams and professionals. These bold accents, combined with a solid black design, create a striking contrast that enhances readability while emphasizing the rugged, professional aesthetic.
Cutting-edge design with functional beauty
The organic design of the GRAVITYMASTER GR-B300EC is inspired by next-generation aircraft, featuring a sleek, seamless exterior. The Carbon Core Guard structure and wide 3D face offer durability, improved readability, and a comfortable fit. Practical features include dual-time functionality for tracking two cities simultaneously, a flight log memory to record routes, and more.
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Digital Compass
60-second continuous direction measurement. Includes auto horizontal compensation.
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Barometer
Sudden atmospheric pressure change alarm.
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Altimeter
Altitude measurement interval 1 sec.*
Measurement unit 1 m.*Takes measurements every second for the first 3 minutes and every 5 seconds or 2 minutes thereafter(selectable).
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Thermometer
Measures the temperature at the current location.*
*When measuring the ambient temperature, be sure the watch is removed from the wrist to avoid interference from body temperature, perspiration (water droplets), direct sunlight, and other external factors.
Duplex LCD
MUDMAN GW-9500MEC
While providing resistance to dust, mud, and shock with its structure, this watch also incorporates radio-controlled, solar-powered functionality. The digital compass display with improved readability employs a duplex LCD for greater practical utility. Stainless steel is used for the bezel components, with black IP completing the look with an intrepid appearance.
*Second image shows the GW-9500-3.
Details:
Carbon Core Guard structure: strong yet lightweight
The GR-B300EC’s carbon fiber-reinforced resin case*1 ensures exceptional strength and durability, while maintaining a lightweight design for a comfortable fit. The unique carbon fiber texture varies from model to model, adding individuality to each piece.
Sustainable materials: Bio-based resin
Key components like the case, bezel, and band are made from bio-based resin, derived from renewable organic resources. This eco-conscious material helps reduce environmental impact without sacrificing performance.
Solar-powered timekeeping with enhanced accuracy
The GR-B300EC features Bluetooth® connectivity, while the GWG-B1000EC adds Multiband 6 radio control for precise timekeeping. The GW-9500MEC is equipped solely with Multiband 6 radio control. These technologies ensure superior accuracy and reliability in any condition.
Super Illuminator: High-brightness LED light
The Super Illuminator feature ensures optimal readability in the dark.
- GR-B300EC: Dial
- GWG-B1000EC: Dial and LCD (Full-auto light)
- GW-9500MEC: LCD (Full-auto light)
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