The binoculars feature bright, multicoated lenses and BaK4 high index prisms, delivering bright, high-resolution images. The Nikon Action 7x50 EX Extreme All-Terain Binocular offer long eye relief for a clear and comfortable view, especially for eyeglass wearers. The smooth central focus knob provides a fast range of focus for quick viewing. The unique click-stop, twist-out eyecup design delivers both long eye relief and variable eye relief to customize the binoculars to your eyes and accommodate glasses. The ergonomic body design ensures comfort for extended viewing. They have a durable and protective rubber-armored coating for a sure, non-slip grip, wet or dry. They are waterproof and fogproof, being nitrogen-filled and O-ring sealed. They are manufactured responsibly with lead and arsenic-free Eco-Glass. This is a renewed product backed by a 90-day warranty.