The Navigator Pro Series is the choice for recreational boaters, weekend anglers and hobby sailors. Built to excel in tough marine environments, they will provide a lifetime of use for water enthusiasts. Delivers excellent image clarity, sharp definition and contrast and oversized light-gathering objective for bright picture in low light. Features high contrast optics- provide bright, sharply contoured images with natural color definition for outstanding viewing quality suitable for both beginners and professionals; floating prism system- uses flexible silicone lens mount to absorb severe shock, impact and abuse without damage; Sports-Auto Focus System lets you focus each eyepiece to your vision once, then keeps images razor sharp from 20 yards to infinity. No more chasing focus on moving objects; Makrolon housing is durable polycarbonate with NBR Long Life rubber armoring, creating a lightweight, rugged chassis that withstands 11 Gs of impact. Includes Neoprene neck strap, objective cover, rain protection cap and carry case.