Nowadays the products that can be used in more fields than similar products will be the popular ones. If you are the one of this kind of customers, you will feel lucky. Because our binoculars could meet what you need.Optical Binocular could be used to view objects that are not at a fixed distance must have a focusing arrangement which changes the distance between ocular and objective lenses. Traditionally, two different arrangements have been used to provide focus. HD Binoculars with "independent focus" require the two telescopes to be focused independently by adjusting each eyepiece. HD Binocular is designed for heavy field uses, such as military applications, traditionally have used independent focusing. What's more, the Optical Binocular can also be used as Night Vision Binocular. Because general users find it more convenient to focus both tubes with one adjustment action, a second type of binoculars incorporates "central focusing", which involves rotation of a central focusing wheel to adjust both tubes together. The Optical Binocular has adjustable magnification which is intended to give the user the flexibility of having a single pair of binoculars with a wide range of magnifications. According to the obvious features, I have to say that the Portable Binocular is compact and so easy to carry. It is absolutely a great choice for you.