10X50 Marine Binoculars for Adults With Rangefinder Compass Hunting Binoculars for Boating Navigation Nitrogen Waterproof with Internal Rangefinder Compass 10x50 Waterproof, Battalion, with Internal Rangefinder Directional Compass, Designed to meet military standards, Waterproof and fogproof, Fully multi-coated optics, BAK-4 prisms, Individual eyepiece focus, Fold down eyecups, Attached lens covers, Rubber armor covered, whether you are ashore or on the water, this binocular is designed to perform in the most demanding conditions. Magnification:10X Objective lens diameter: 50mm Prism Type: Porro Prism Binoculars Prism Glass: BAK4 Weight(kg):900g Type:Binoculars Size:16.5CM x 19CM x 6CM Focus System: Individual Field Angle: 7.5 degree Field of view: 396 (FT/1000 yards); 132 (M/1000M) Exit Pupil: 6.8mm Exit Relief: 23mm (Long eye relief for eyeglass wearers) Lens coating: Fully multi-coated Close Focusing Distance: 2.5m Diopter adjusting range: -5-and5 DIOPTER Interpupillary distance: 56-72 mm Features: Compass,Floating,Rangefinder,Waterproof Eye cup: Fold down Packing: 1.carrying bag 2.neck strap 3.objective covers 4.lens cleaning cloth 5.battery:2 LR936 Note: Due to Air-