The for BOSTRON telescope is designed entirely for the needs of outdoor sports, with reliable quality and meeting the diverse requirements of outdoor activities. Ensure higher brightness and contrast comprehensively, especially in dim environments, More details of the scenery can be seen than ordinary telescopes. Coated prism, clear imaging: BAK4 coated prism ensures clear and bright image quality even at the edges. Anti mold and anti fog, can float on the water surface: Nitrogen filled, waterproof, mildew proof, and fog proof are completely suitable for outdoor environments. Short tube design, can float on the water surface, Built in distance measuring and dividing board, specially designed distance measuring and calculating ruler. Comprehensive multi-layer broadband anti reflective (green) film, realistic color reproduction. Type:Binoculars Adjustable Magnification: Not adjustable Effective caliber (mm): 50 Field of view ft/1000 yds: 396 Prism material: BAK4 Exit pupil diameter (mm): 17 Relative brightness: 50 Exit pupil distance (mm): 24 Waterproof, anti fog, and shockproof: Yes Recent observation distance (mm): 4 Footstand interface: Yes Specification:10X50 Colour:Army Green Material:engineering plastic Package Contents: 1 x Binoculars 1 x eyepiece cover 1 x Bag 1 x English manual 1 x shoulder strap 1 x mirror cloth