Since its launch in 1983, toughness watch evolving G-SHOCK in search of defunct strength insatiable. The flat-screen module and the carbon Nkoagado structure, is GST-B400 of the G-STEEL with improved design slim. Achieve the thickness of the further miniaturization and module components. While suppressing the Thickness also maintained high functionality that BluetoothR and solar, power consumption has been reduced significantly. In addition, by car Bonn core guard structure, realize the thinnest (2021 of March) in the G-STEEL series while keeping the impact performance. In terms of design, by reducing the button guard to the limit, it adopted an easy-large stainless steel button press while being slim. Enjoy the difference in the texture by applying a different finish to the TOP bezel and middle bezel, directly below will finish stuck to look. The colors, G