These are the buoyant binoculars that survive an accidental fall overboard. They are O-ring sealed, have an IPX5 water resistance rating, and are filled with nitrogen to resist fogging. The binoculars’ fully multi-coated 50mm objective lenses provide optimal light gathering while focusing knobs grant 7X magnification from its BaK-4 glass Porro prism system, yielding field of view of 396' at 1,000 yards. Each lens has independent +/-5 diopter adjustment, and both lenses adjust for 56-72mm interpupillary distance and optimal exit pupil distance up to 6.8mm. With an illuminated compass, rubber fold down eyecups, and non-slip grip. Includes neck strap, carrying case, eye covers, and lens cloth. 8 1/2" L x 6" W x 3 1/2" D. (2 1/2 lbs.)