Powered by a long-lasting silver-oxide battery (included), MTMs limited-edition Special Ops Patriot Steel Watch keeps you in the know and on schedule for as long as three years. Its rugged case is crafted from solid 316L steel with a black DLC finish and encases an anti-reflective and scratch-resistant crystal-sapphire face and stainless steel, unidirectional bezel. A NASA carbon-fiber dial and luminous hands and numbers make it quick and simple to read at a glance. This watch also boasts 60-minute OS20 chronograph quartz movement, integrated date window and screw-down, locking crown and case back. Each comes individually numbered to signify it as a limited-edition piece. Remains water -esistant to 200 meters. Manufacturers three-year warranty. Case dia: 44mm. Wt: 9 oz. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Analog/Chronograph Watches.