GR-B100-1A4 is a GRAVITYMASTER aviation-inspired G-SHOCK featuring a black resin case paired with a black resin strap and bold orange accents for a rugged, functional design. The analog-digital display is set against a dark dial with large markers for enhanced readability. Built with shock resistance and 200-meter water resistance, it is designed for demanding environments. Equipped with Bluetooth smartphone connectivity and a digital compass for directional measurement, it offers practical tools for navigation and everyday use. Mineral glass protects the dial, while confirmed functions include world time, stopwatch, countdown timer, daily alarms, and a double LED light for clear visibility in low-light conditions.