Reference: GSTB400CD-1A3
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Case: stainless steel with a green ion-plated bezel
Size: 46.6 × 49.6mm
Movement: solar-powered, manufacture quartz caliber
Function: date, world time, chronograph, Bluetooth connectivity
Dial: black
Power Reserve: supports charging via solar and USB
Water Resistance: 200m
Strap/Bracelet: stainless steel
Factory Warranty: one year


The GSTB400CD-1A3 has a bezel with a new green ion-plated finish, which brings out the texture of the metal.

The slim GSTB400 design is made possible by advances in component miniaturization and thinning of its modules, without sacrificing any Bluetooth or solar functions. Power consumption has also been significantly reduced.

In terms of design, the number of button guards has been reduced as much as possible, enabling the use of large stainless steel buttons that are slim yet easy to operate. The top bezel has been given five different finishes, while the middle bezel has been given four different finishes, which creates an elegant effect and changes the appearance of the texture of the metal depending on the viewing angle.