These binoculars are easy to use and easy to slip into your backpack or the glove compartment of your car afterwards. 10x magnification helps bring objects much closer.National Geographic 10x25 compact parro prism binocular features: Water-resistant Rubber coated Porro-Prism Magnification: 10x Lens Diameter: 25mm Centre focus Diopter adjustment Lightweight, compact and comfortable Made of fully-coated BK 7 glass Comes with a case, strap and cleaning cloth.