Celestron SkyMaster 20x80 Binoculars 20x magnification porro prism binocular Giant 80 mm objective lens offers maximum image brightness in low-light and long-range conditions Ultra sharp focus across the field of view Multi-Coated optics for sharp, clear views Suitable for terrestrial or astronomical viewing Protective rubber covering for ultra-firm grip Long eye relief ideal for eyeglass wearers NOTE : Kindy refer the User Manual [pdf ] Specification Sheet [pdf ] Warranty [pdf ] which is available below