Luminox is known around the world for their durable reliable watches that are depended on by the men and women who serve to protect their countries. The Luminox XS3581BO features an all-black dark aesthetic that has been crafted from a durable resin. The watch features chronograph technology with three sub dials that have been set into a black dial with a subtle gravel texture. The hour indicators and watch hands have been coated with illuminating paint that allows for clear readability in the darkest conditions. - Chronograph - 45mm Case Size - Carbonox Case - Rubber Strap - 43 Months of Approximate Battery Life - Constant Glow for up to 25 Years - Unidirectional Rotating - Hardened Mineral Crystal - 200 Meters Water Resistant