With 160X magnification, these are the world's most powerful zoom binoculars. They have a telescope's long-distance power for observing planets and can see an insect perched on a leaf half a mile away. With a superior BaK4 porro prism system and highest quality optics, the binoculars have a sharp, distortion-free exit pupil, and the fully multicoated 70 mm objective lenses display a bright, clear view, even amid glare or dim conditions. A large sliding lever allows for quick shifts from the 30X magnification to the maximum 160X zoom, and a sensitive focusing knob sharpens the image with one finger. A diopter eyepiece adjuster accounts for a user's eyesight, the eye cups accommodate viewing with glasses, and a rubberized exterior provides a firm grip and shock protection. Comes with neck strap, case, dust caps, and tripod adapter. A tripod is recommended for stability at high zoom. 9 2/3" L x 8" W x 3 1/4" H. (3 1/3 lbs.)