Horn eye mask, prevent oppression of the eyeball, the full line of sight light film clear no halo. Multi-Functional Kids Binoculars - Enhance concentration, see the distant view, correct understanding of the world, help children grow. Can share with friends, guide children to learn to share with others, form a good habit. Learn how to communicate with others while playing.Wonderful gift for your kids. Educational Telescope for kids - Increase knowledge, explore the principles of optics and cultivate children's scientific potential. Product description Item type: Children Binocular Telescope Material: rubber + metal Product model: 8X21 Magnification: 8 times Objective lens diameter: Approx. 21mm Eyepiece diameter: Approx. 12mm Field of view: about 122m-1000m Prism: BAK4 Coating: FMC Focusing mode: middle + right eye Size(length x height): Approx. 108x96mm/4.3x3.8in