Features: Waterproof, dust-proof, all-weather binoculars suitable for outdoor use even under severe conditions such as watersports and mountaineering. Nitrogen gas inside the binocular eliminates fogging and mold on internal lens surfaces even under extremely severe condition, such as rainstorms and high humidity. Internal rangefinder scale and directional compass with illumination switch indicate the distance or size of the object being viewed and its orientation. Hi-index BAK4 prism features a bright, sharp image with vivid contrast to offer you every little detail of an object. Rubber-coated body provides great shock resistance and a comfortable touch, firm grasp.