[Large field of view] 168 ft/1, 000yds, good for fast moving subject. Perfect for adults bird watching, sightseeing, hunting, wildlife watching, sports events, etc. [Sleek and solid] durable framework rubber finish makes shock resistance and a firm, comfortable grip, Durable. [Easy to use] Adjust the frame untill you see only one circle, focus by adjusting the right eye cup and center wheel until you see image clearly, only 10 seconds quick focus.