With built-in 2-dimensional Range Finder reticule, measuring grid are convenient for distance determination. Porro prism shock proof rubber armored design working in wide temperature range from -40 to +50 degrees Centigrade. True Color coating with antireflection "Ruby" layer. Central focusing. Right ocular focus correction. All metal construction. Comes with case and shoulder strap. Designed for use in extreme cold and heat. Specifications: Magnification - 10X Objective lens - 40 mm Field of view - 6° 30' degree Exit Pupil Diammeter - 4.0 mm Dimensions - 55x155x175(mm) Weight - .72 kg Focus Center-wheel