Casio G-Shock GST-B400-1AER

The G-STEEL series is expanding with the new GST-B400 models! The new, enhanced design is made possible by a slim module and a carbon-reinforced stainless steel case. 

The GST-B400 features increased miniaturization of components and a reduction in module size without compromising Bluetooth or solar functionality. Power consumption has also been significantly optimized.

Furthermore, this model is the slimmest in the G-STEEL series thanks to its carbon-reinforced stainless steel case. Nevertheless, it simultaneously offers a high degree of shock resistance. Compared to the GST-B100 series, the GST-B400 is more than a millimeter thinner, at 12.9 mm.

In terms of design, it's immediately noticeable that the choice fell on large, slim, but easy-to-use stainless steel buttons. 

For this model, you can use the G-SHOCK Connected app for Android and iOS.