High-Quality, Lightweight Optics Are Constructed With Slip-Proof, Shock-Proof Rubber Armoring To Perform In Rugged Field Environments. Ruby Coated Lenses Improve Image Contrast. Collapsible Rubber Eyecups For Viewing Even With Eyeglasses. Separate Diopter Adjustment. Center Focusing. Includes Lens Caps, Neck Strap And Carry Pouch With Belt-Loop. Limited Lifetime Manufacturer¡¯S Warranty. Field of View: 367¡¯/1K yds.