Packed into this Copperhead HD 10x42 binocular is the power to surprise you, featuring an HD optical system for outstanding color fidelity, edge-to-edge sharpness, and light transmission. The Copperhead also offers adjustable eyecups and a diopter so you can get a custom fit, and waterproof, fogproof, shockproof performance keeps you in the game no matter the weather or terrain. As a backup, or as your primary hunting or observation optic, they aren't just good for the money: They're good for all your outdoor adventures. Product Features Fully Multi-Coated: Anti-reflective coatings on all air-to-glass surfaces provide increased light transmission for greater clarity and low-light performance. Roof Prism: Valued for greater durability and a more compact size. Rubber Armor: Provides a secure, non-slip grip, and durable external protection. Center Focus: Wheel Adjusts the focus of both binocular barrels at the same time. Diopter: Adjusts for differences in a user's eyes. Located on right eyepiece. Waterproof: O-ring seals prevent moisture, dust and debris from penetrating the binocular for reliable performance in all environments. Fogproof: Nitrogen gas purging prevents internal fogging over a wide range of temperatures. Shockproof: Designed to withstand the highest levels of impact. Tripod Adaptable: Compatible with a tripod adapter, allowing use on a tripod or car window mount. Includes: GlassPak Binocular Harness and Case Comfort Neck Strap Tethered Objective Lens Covers Eyepiece Lens Covers Lens Cloth Product Specifications Magnification: 10x Objective Lens Diameter: 42 mm Eye Relief: 17.0 mm Linear Field of View: 334 feet/1000 yards Angular Field of View: 6.4 degrees Close Focus: 15.3 feetInterpupillary Distance: 55-75 mm Height: 6.1 inches Width: 5.0 inches Weight: 22.9 oz