Bial 10x50WA Zoom Binocular Waterproof Germany Super High-Powered Surveillance Binoculars Diopter adjustment for fine focusing Rubber-coated body for firm, non-slip grip,waterproof. Specification:10x50WA,367FT.AT1000YDS,waterpoof germany. Fully coated optics for improved clarity and light transmission. Focus: Center the handwheel adjustment and right eyepiece parallax adjustable