Casio G-Shock G-Steel Bluetooth Smartphone Mens Watch GSTB100-1AThe world famous G Shock brand introduces the first G Steel with chronograph functionality on a pure analog watch model. It showcases a super tough design with the new 'Layer Guard Structure' feature as well as an array of other cool functions such as smartphone linking, Tough Solar, dual world time, and a high quality rubber band that offers a level of durability comparable to that of metal. The advantages of the strap include an improved fit around