Introducing the G-STEEL GST-B400, a stylish timepiece with the slimmest profile yet, featuring an ultra-thin module encased in carbon fiber. The carbon core guard structure, strong yet lightweight, absorbs external shocks while retaining Bluetooth connectivity and solar power functionality. With a thickness of just 12.9mm from the back of the case to the top of the bezel, it is over a millimeter thinner than its predecessor. Choose from four distinctive styles, including silver metal band and case, light silver case with a dark resin band, a dial in dramatic red vapor deposition finish with a black ion-plated bezel, or a bold blue vapor deposition finish with a black ion-plated bezel and band. The top bezels feature five different finishes, and the middle bezels feature four, delivering exceptional metal textures from every angle.