The Barska(R) 12x42 Blackhawk Binoculars are designed to perform in all weather conditions. The binoculars feature BAK-4 prisms and multi-coated optics to deliver bright and crisp images. Individual diopter adjustments allow you to alter to your personal preference and its diamond-textured rubber covering offers a non-slip grip. The Barska(R) Blackhawk binoculars are nitrogen-purged and o-ring-sealed for waterproof and fogproof protection. FEATURES: BAK-4 prisms and multi-coated optics deliver bright and crisp images Long eye relief for comfort Individual diopter adjustments Twist-up eye cups Diamond-textured rubber covering for non-slip grip Waterproof and fogproof Focusing System: Center Includes carrying case, lens covers, neck strap, and lens cloth Limited lifetime warranty Model: AB11840 For additional information relating to the Manufacturer's Warranty, please contact 909-445-8168. SPECS: Magnification: 12x Prism type: Roof Prism Glass: BAK-4 Field of View (ft@1000yds): 276 ft. Objective Lens: 42mm Color Lens: Green Lens Exit Pupil: 4.2mm Eye Relief: 17 mm Close Focus: 6' Weight: 25 oz.