These top-in-their-class waterproof binoculars feature precision optics with full multicoatings to enhance brightness, contrast, sharpness, and color accuracy. Porro BaK-4 prisms provide edge-to-edge illumination, making these ideal not ony for birders but also for low-light viewing and astronomy. They boast a rugged, rubber-armored, water-resistant body; comfortable long eye relief; a 143-metre-wide view at 914 metres; and the ability to focus on objects just 4.5m away. Strap and case included. National Geographic x 40 Binoculars features: Dimensions: 190mm W x 70mm L x 17mm H Weight: 907g What's in the box x 1 National Geographic 8 x 40 Binoculars