Tough, dependable marine optics with the world's most stable and easiest to read compass system. The compass also includes a range finding reticle for distance determination, and electronic compass illumination for bearings in darkness. The new Steiner 7x50 Observer offers superb performance at an exceptional price. Equipped with Steiner's Sports Auto-Focus system, everything is in focus from 20 yards to infinity once set for your eyes. The Steiner Observers are guaranteed waterproof and shockproof to stand up to harsh marine use. In fact, the rubber armoring prevents slipping, even on a wet surface. Included are a web strap, rain and spray guard for the eyepieces and attached objective lens caps. Takes two E344 Alkaline batteries. 10-year limited warranty.