The 7x50 Waterproof Deep Sea Binoculars offer outstanding performance specifically for nautical and boating enthusiasts. Nitrogen purging and an O-ring seal keep these binoculars moisture- and clouding-free, offering 100 percent waterproof and fogproof integrity. The stunning BAK-4 prisms provide clear views of marine observation with fully multi-coated optics for increase clarity. Find your way around the sea using the internal rangefinder and directional compass as your navigation. The magnification provides steady images even with rough sea conditions. Enjoy the exceptional clear views of marine observation that these binoculars offer from sunrise to sundown.