Whatever you're doing, wherever you are - the G-shock Master of G line has your back. Based on Gravitymaster, Mudmaster, and Mudman models that deliver peak performance in punishing conditions in the air and on land, this line features a black watch case symbolizing toughness, with accents in vivid emergency colors that capture the world of professionals involved in rescue efforts and other critical missions. Gravitymaster GRB300EC is inspired by next-generation aircraft and rendered with a seamless exterior design. The Carbon Core Guard structure and wide 3D face deliver durability, readability, and a comfortable fit. Enjoy all the practical functions as well, including dual time simultaneously showing the time in two cities, a flight log memory function for recording routes traveled, and more.