The GRAVITYMASTER GR-B300 is an aviation-inspired watch built for pilots and adventurers. Its Carbon Core Guard structure uses aircraft-grade materials for shock resistance and durability in extreme conditions. Key features include flight log memory to record location and time, dual-time zone display, and app-based time switching for seamless travel. Large index marks and a metal bezel ensure easy readability, while the rotary disc indicator at 9 o'clock displays alarm status, stopwatch, and battery level with smooth dual-coil motor operation. The cockpit-inspired black and white dial with color accents delivers professional functionality. Bio-based resin components in the case, bezel, and band reduce environmental impact without compromising performance.