GST-S130BC-1A3 is a G-STEEL analog-digital model featuring a stainless steel bezel layered over a resin case, paired with a black resin band for a durable and structured build. The black dial is accented with green details, creating a bold yet balanced contrast within its industrial design. Powered by Tough Solar, it converts light into energy for reliable performance without frequent battery changes. Built with shock resistance and 200-meter water resistance, it is suited for active daily wear. The mineral glass protects the display, and confirmed functions include world time, stopwatch, countdown timer, multiple daily alarms, and a double LED light for clear visibility in low-light conditions.