The Sport Timer watch by Luminox has a 42 mm case and sapphire crystal with anti-reflective coating. The case is made of stainless steel with a ceramic bezel. The Luminox watch comes with their signature light technology which provides self-powered illumination lasting 25 years with no external light source needed. The Sport Timer automatic movement watch displays the date on the dial, has a blue dial, stainless steel bracelet, and an open aperture case back.