Specification: Magnification:10x; Objective lens glasses diameter:50mm; Prism Type:Roof; Field of view:306.6 ft/1000yds; Lens coating:Broadband Multi-coated; Prism Coating:Aluminum Reflective Coating; Number of Lens:8 pieces / 6 groups; Diopter Regulation:-3 ~ +3 Degree; Weather Proof:Yes; Waterproof:Yes (1.5m/3 minutes); Nitrogen Filled:Yes; Focus System:Center; Diopter System:Right Eyepiece; Eye cup:Twist-up; Eye Relief:17mm; Exit Pupil Diameter:4.88mm; Focusing Lens:Int.; Close Focusing Distance:2.5m; Color:Black; Tripod Adapter:Yes; Net Weight:16.21oz; Optical System Length:160.7mm; Dimensions (in):2.52(L) x1.9 (W) x6.61 (H); Features: 1.Aluminum Reflective Coating Prism - provide high quality Optimize light transmission. 2.50mm broadband multi-coated - Increase light transmission to allow the most light for the best viewing experience. 3.Waterproof and Fogproof -Nitrogen Sealed body for waterproof and fog proof protection in any weather and any environment4.Adjustable Eyecup Twists up and down for comfortable viewing with or without eyeglasses. 5.Rubber Armor - Provides a secure, non-slip grip, and durable external protection. 6.Eyepiece and lens protection covers protects against unwanted scrapes and scratches. 7.Nylon mesh carrying case to keep your monocular safe wherever you travel. 8.Tripod adaptable - Compatible with a tripod adapter, allowing use on a tripod (Durable Metal interface)9.The monocular is designed for sport using, hunting, camping, bird watching and other outdoor use. Package included: 1 x 10x50 Waterproofs Monocular; 1 x Lens Cleaning Cloth; 1 x Hand Strap; 1 x Hand Strap Bag; 1 x User Manual; 2 x Lens Cover;