The Barska 7x42 Waterproof Deep Sea Monocular w/Internal Rangefinder and Directional Compass is designed specifically for the nautical and boating enthusiast. With 7x magnification (most popular size because of the steady image achievable under rough sea conditions) and exceptional optics, this binocular provide clear views of marine observation from sunrise to sundown. Has individual focusing system for personal customization of viewing. The fully multi-coated optics and BAK-4 prism glass provide wide light transmission and crisp images. The roof prism system allows the binoculars to have slimmer construction. 100% water proof and fog proof that is O-ring and nitrogen purged sealed to prevent fogging clouding and moisture damage. The monocular is compact but still has the non-slip and ergonomic rubber design for a secure grip with heavy-duty and shockproof rubber armor. Backed by a Limited Lifetime Warranty (compass does not operate in Southern Hemisphere). Includes carrying case, neck strap, lens covers and lens cloth.