Introducing the Casio G-Shock GST-B400-1AER. Featuring the G-STEEL GSTB400 trademark structure, which combines the strength of carbon with the quality of metal, but now in the slimmest profile ever. The design offers enhanced texture in the dial and the convenience of smartphone connectivity, accelerating the advance of G-STEEL as a multifunction analogue watch. The watch features a stainless steel bezel in a sophisticated shape. With painstaking attention to detail, even different facets of the same part are uniquely finished by applying lengthwise, crosswise, or circular hairline and mirror finishes, polishing processes and more. The result is an impressive array of metallic surface textures that captivate the eye from every angle. Features include solar power, 200 metres water resistance, neobrite luminous coating and stop watch.