GR-B300-1ADR This G-SHOCK MASTER OF G GRAVITYMASTER model features a black bio-based resin band with a bio-based carbon, bio-based resin, and stainless steel case and bezel, paired with a high-contrast black analog dial inspired by aircraft cockpit instrumentation. Built with shock-resistant Carbon Core Guard construction, mineral glass, Neobrite, Tough Solar power, a screw-lock crown, and 200-meter water resistance, it combines lightweight durability with aviation-focused functionality. Confirmed functions include Bluetooth smartphone connectivity, automatic time adjustment, dual time, world time for approximately 300 cities through the CASIO WATCHES app, flight log memory, a 1-second stopwatch, 24-hour countdown timer, daily alarm, phone finder, full auto-calendar, battery level indicator, power saving, and Super Illuminator LED lighting, making it a practical choice for travel, aviation-inspired use, and active everyday wear.