The sky’s the limit with the g-shock gravitymaster—an aviation-inspired watch designed to work in the harshest environments. 54mm black bio-based resin case with carbon fiber core and mineral crystal high-contrast black and white dial with subtle red color accents evoking the look of a cockpit instrument panel features include world time, timer, stopwatch, alarm, double led light, neobrite, and calendar powered by tough solar smartphone linking using bluetooth® neon yellow bio-based resin strap; buckle clasp shock resistant; water resistant to 200 meters