Bushnell 7X50 Marine Waterproof with Compass Binoculars Bundle MARINE: Marine binocular with 7x magnification and 50mm objective lens | Illuminated, analog compass and ranging reticle OPTICS: BaK-4 porro prisms for bright, clear, crisp viewing | Fully multi-coated optics for light transmission and brightness WATERPROOF/FOGPROOF: 100% waterproof / fogproofand resists saltwater corrosion | O-ring sealed and nitrogen-purged to keep out moisture ARMOR: Non-slip, non-skid rubber armor cushions bumps and shock and prevents sliding and provides a firm grip when wet DESIGN: Hermetically sealed and features fold-down eyecups