Blue Edifice Watch with a metal band. Features a 10-Year Battery 100 meter water resistance and a Mineral Crystal.With the launch of its first watch in November 1974 Casio entered the wristwatch market at a time when the watch industry had just discovered digital technology. As a company with cutting-edge electronic technology developed for pocket calculators Casio entered this field confident that it could develop timepieces that would lead the market. Today Casio is focusing its efforts on solar-powered radio-controlled watches: the built-in solar battery eliminates the nuisance of replacing batteries atomic timekeeping means the users never have to reset the time. Recently Casio launched a series of Bluetooth watches that sync to the users cell phone to automatically update the time. Casio is always moving time forward.. Band Material: Stainless steel. Case Diameter: 37 millimeters. Calendar: Date display at the between the 4 and 5 o clock position.. Movement: Quartz