GST-B100BNR-1A is a G-STEEL analog chronograph featuring a black ion-plated stainless steel case and bezel paired with a black resin strap, accented with refined red detailing across the black dial. Constructed with a carbon core guard structure, it balances strength and layered depth in a modern, technical design. Powered by Tough Solar and equipped with Bluetooth connectivity for smartphone linking, it ensures precise timekeeping and convenient functionality. The dial layout includes multiple sub-dials for chronograph and world time functions, protected by mineral glass. With shock resistance and 200-meter water resistance, it is built for dependable daily wear and active environments.