Must-have chronograph features a silver-tone stainless steel case and an sleekdial, with its bold 46mm shape secured to the wrist via a matchingleather strap. Underneath a scratch-resistant sapphire crystal, the watch's dark display is on view, with white- and silver-tone accents working in tandem with analog and digital components for the unique Skyhawk's unique aesthetic and technical capabilities.The advanced functions of the watch include atomic time clock synchronization for superior accuracy, time adjustment available in 43 world cities, 1/100 second chronograph measures up to 24 hours, perpetual calendar, GMT dual time (second time zone), 2 alarms, 99-minute countdown timer, digital backlight display, Universal Coordinated Time (UTC) display, and a power reserve indicator. This distinctive sports watch utilizes Citizen's Eco-Drive technology that's sustainably powered by any light and never needs a battery. Water resistant up to 200 meters. Caliber U680. 46mm stainless steel case LUG WIDTH (MM): 22 Black dial Sapphire crystal - Anti-Reflective Sapphire Crystal Impact and shatter resistant - anti-reflective coating deflects light WR200/20Bar/666ft [Swimming, Showering & Snorkeling] Power Reserve Indicator Date window Synchronized to Atomic Time Clock for Superior Accuracy Atomic Timekeeping Technology with Synchronized Time Adjustment Available in 43 World Cities 1/100 Second Chronograph Measures up to 24 Hours Perpetual Calendar Dual Time (Second Time Zone) 2 Alarms 99-Minute Countdown Timer Digital Backlight Display Universal Coordinated Time (UTC) Display Power Reserve Indicator Black Leather Strap Citizen Eco-Drive Style #: JY8149-05E.