The 7x50 ergonomic, contoured shape -- similar to models that Steiner manufactures exclusively for the U.S. Army and U.S. Navy SEALs -- is designed for maximum comfort during extended use, and the rugged rubber armoring ensures a firm grip. At only about 2 lbs., officers on an extended stakeout can glass for hours without arm fatigue.  BAK 4 prisms ensure optimal brightness and clarity in all light conditions, and the Porro prism binoculars are in instant focus once adjusted for the user?s eyes. No additional adjustment is necessary when scanning a landscape from 20 yards to infinity. The Police binoculars feature handsome black color rubber armoring with bold "POLICE" lettering giving them an official look that sets them apart from Steiner?s military and civilian models. Warranty: 10 year limited warranty.