The RD-842 binoculars are waterproof and high definition binoculars that feature an open bridge design. These binoculars for birding are also great for all sorts of fun outdoor activities, from hiking to sporting events and everything in between! The RD-842 features BAK-4 prisms and multi-coated optics, ensuring high power and quality as well as ease-of-use. waterproof binoculars, boating supplies, gifts for bird lovers, wildlife viewing supplies, gifts for rural areas, site seeing suppliers