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Rarely does a watch marry style, toughness, and innovation like the G-Shock ‘G-Steel’ connected lineup. 


The G-Shock GSTB100XA-1A Chrono Solar Carbon Edition is the first model featuring a bezel made of lightweight yet very rigid carbon material, providing outstanding shock resistance characteristics. 

Equipped with Bluetooth®, it connects with a smartphone via a G-Shock Connected app, to receive detailed time information from an internet time server. 


Stainless steel and resin are layered together into what Casio calls an "unbreakable combination", while scratch resistant, clear sapphire glass is used for the crystal. 

You won't have to worry about the battery with this watch. A stable power supply is achieved through 'Tough Solar' technology in combination with Casio power saving technology.

The G-Steels power output is impressive, enabling high brightness LED light illumination.


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Sun Powered

A solar panel converts even weak illumination from fluorescent lighting into electric power.

A rechargeable battery with a large power storage capacity supports stable operation of various functions with high electricity consumption.

You never have to worry about the battery running down because it's a solar battery.

Heavy Duty Construction

The G-Steel’s layered guard structure boasts a double-layer bezel construction of stainless steel and resin or resin and fine resin which delivers the hard, sleek beauty of metal while retaining the impact absorption of resin.

This watch is heavy duty.

Lightweight Carbon Bezel

The carbon composite bezel is constructed of resin amalgamated with a lightweight, highly rigid carbon-fiber material developed with Nano Alloy technology. 

After layers of unidirectional fibers are alternately stacked in the vertical and horizontal directions and bonded together, the resulting laminated material is cut into the form of a bezel.

It is then finished in a pyramid-shaped design inspired by n metal file. 

Double LED Lights

Two white LED lights cast brilliant illumination on the hands and LCD.

Their use in combination with phosphorescent coating ensures excellent legibility in the dark.

Stopwatch & Timer

Like most Casios, the G-Steel features different modes, letting you cycle through the stopwatch and timer.

Once a mode is selected, the other buttons will function according to that mode. 


In the Timer mode, the buttons let you set time duration, then start and stop.