A durable and lightweight set of binoculars, with nitrogen-purged optics to prevent fogging and BAK-4 prisms for sharp images.An exceptional value in a fully waterproof set of marine binoculars. The durable, lightweight polycarbonate housing is filled with dry nitrogen to prevent fogging. Internal O-rings create a seal to ensure moisture protection.They feature multi-coated lenses for brightness in low-light conditions and BAK-4 prisms for sharp images. Light transmission efficiency is 85%. Includes padded neck strap and nylon case. Rated waterproof to IPX7 standard.Key FeaturesDurable and lightweight, with nitrogen-purged optics to prevent fogging and BAK-4 prisms for sharp imagesIPX7 waterproof rating so they are submersibleComfortable viewing with or without glassesSingle composite bodyDurable rubber designMagnification: 7 x 50Light Transmission Efficiency: 85%Eye Relief: 27.4mmPrism Type: BAK-4 PorroField of View: 342' @ 1000yds