The G-STEEL GST-B400 redefines style with its ultra-thin module encased in carbon fiber, creating the slimmest profile yet. The carbon core guard structure, both strong and lightweight, ensures the absorption of external shocks while maintaining Bluetooth connectivity and solar power functionality in a compact design. With a thickness of just 12.9mm, the GST-B400 is over a millimeter thinner than its predecessor. Choose from four distinctive styles, including the simplicity of a silver metal band and case, a light silver case paired with a dark resin band, a dial in a 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. Treated with multiple finishes, the top and middle bezels provide exceptional metal textures, offering a visually striking and functional timepiece from every angle.