BARSKA Deep Sea 7x50 Waterproof Floating Binocular w/ Internal Rangefinder & Compass Hunting optics binoculars Versatile top of the line Another quality product O-ring sealed for complete waterproof protection and Dry nitrogen-purged and sealed to prevent fogging and moisture damage in all weather conditions Fully multi-coated optics delivers luminous and high contrast images with BAK-4 prisms for increased clarity Floats on water so no worries if dropped into the ocean Built in with an internal rangefinder and directional compass Features a rugged rubber armor covering that provides a non-slip and secure grip, designed specially for nautical use Please refer user manual attached below for instructions and troubleshooting steps