Uzi Tritium H3 Watches are the easiest in the world to read in low light conditions and even in total darkness. The light emitting devices require no battery power or any other form of charging. This watch is water resistant to 200 meters (660 feet). Made from high quality Swiss Components, the UZI Tritium Watch features a screw down crown, rotating timing bezel, a scratch resistant hardened mineral glass crystal, an underwater dive strap and self-illumination system glows for over 25 years. Includes gift box. 3 year battery life. 43 mm case diameter.