The Celestron UPCLOSE G2 Roof Monocular - 10x25 is a high quality but economically priced monocular, perfect for bird watching, sporting events, concerts, travelling and studying nature and wildlife. They have multi-coated optics which increase light transmission resulting in brighter and sharper images with high contrast levels. Their stylish rubber covered aluminum body protects from rough handling, and they have ergonomic thumb indents and finger ridges for extra non-slip comfort and ease of use. They come with a soft carrying case, binocular straps, and are also water resistant. SPECIFICATIONS Aperture (mm) 25 mm Magnification (x) 10x Angular Field of View 5.7° Linear Field of View (@1000 yds) 299 ft (100 m) Exit Pupil (mm) 2.5 mm Eye Relief (mm) 11 mm Close Focus 26.2 (8 m) Prism Glass (Type) BK-7 Optical Coatings Multi-Coated Included Accessories Soft case Weight (oz) 4 oz (113 g)