Casio G-Shock GRB200-1A Quad Sensor Gravity Master Carbon Core

These Quad Sensor Bluetooth connected G-SHOCK Master of G “GRAVITYMASTER” GRB200 models pack flight mission essential functions into a tough and rugged carbon core guard structure.


A high-strength, highly weather-resistant Carbon Core Guard Structure protects the module with a resin case reinforced with carbon fibers. This, combined with world-renowned G-SHOCK shock resistance, creates a structure that is also highly vibration resistant. The bezel is made up of three layers of resin with carbon fiber inserts. The top layer is semi-transparent to reveal the carbon material inside. The three buttons on the right side of the watch are arranged in a way that makes them resemble a fighter jet control stick, while also contributing to ease of operation.


The Quad Sensor system of these models uses compact sensors that make it possible to pack compass, altitude/barometer, and temperature measurement capabilities, along with an accelerometer that keeps track of your step count, into a compact configuration. This makes it easy to keep tabs on the natural environment around you and to maintain logs of your activities for comprehensive flight mission support. A special G-SHOCK phone app simplifies configuration of watch settings, and also provides a Mission Function.

Carbon Core Guard Structure

Bluetooth smartphone link

Quad Sensor

Thermometer, Altimeter/Barometer, Digital Compass, Step Counter
Approx. battery life: 2 years on CR2025
Size of case : 63x54.1x18.3mm
total weight : 80g
Resin Band
Carbon Core Guard Structure
Shock Resistant
Vibration Resistant
Mineral Glass
200-meter water resistance