*The color tone of the listed products may differ from the actual product in some cases.
Start with strong, lightweight carbon fiber, then add rugged style in a handsome black and gray color scheme. Now you’re ready for anything. Designed for pros working in tough environments, MASTER of G specialty watches take advantage of carbon fiber’s exceptional strength-to-weight ratio to take timekeeping to entirely new heights. The bezel, made from carbon fiber inserts pressed between layers of resin, delivers outstanding toughness and practicality. And you can count on the exceptional functionality everyone expects from a G-SHOCK watch. Take to the skies with the GRAVITYMASTER GR-B200, boasting an innovative design for pilots who challenge the most extreme conditions high in the sky, presented in an all-black color scheme that stands for serious strength. Or take on the harshest on-land terrain with the MUDMASTER GG-B100. Go totally off-road with this new watch in a two-tone, gray-on-black color scheme.
Carbon Core Guard structure
This new shock resistant structure protects modules with a carbon fiber reinforced resin case.
Mud resistant structure (dust and mud resistant)
Highly airtight carbon case and filter protects against intrusion of mud.
Dual layered case back
Carbon fiber inserted bezel
A triple layered structure with a carbon fiber sheet inserted between fine resin.
Super Illuminator (high brightness LED)
G-SHOCK Connected FREE
- Mission Log function
The altitude measured by the watch and the course obtained from a smartphone’s GPS are automatically recorded to an app. An altitude point can be manually acquired and plotted on the map.
- Location Indicator
Record your current location in an app. Display shows your recorded destination by the second hand, and the distance on the LCD.
- Calorie calculator
- Mode/display switching customization
- Automatic time adjustment*
- World Time for over 300 cities*
- Phone Finder
* Updating of internal data according to the latest time zone/ daylight saving time information
* App screens shown here may differ from actual screens,
since the app is currently under development.
Supported Phone Models (As of Jan 2019)
iOS: iOS 10 or later
Android: Android 6.0 or later
* Bluetooth installed smartphone only.
* Bluetooth® wordmark and logo are registered trademarks of Bluetooth SIG, Inc. and any use of these marks by Casio Computer Co., Ltd. is under license.
* Apple, Apple logo and iPhone are trademark of Apple Inc. registered in the United States and other countries. App Store is a service mark of Apple Inc.
* IOS is a trademark or registered trademark of Cisco Systems, Inc. registered in the U.S.
* Google Play and the Google Play logo are trademarks of Google LLC.
* All other company and product names are trademarks or registered trademarks of their respective owners.