10-300X40mm HD Monocular Telescope -- With BAK4 prism lens design, providing you a amazing viewing experience, giving you a clearer and more colorful scenery. Guarantee superior light transmission and brightness. High Quality -- This monocular is made of high-quality materials. The light reflection and minimum distortion can improve the light transmittance and brightness. The strong frame and shock-absorbing rubber shell ensure durability, prevent it from slipping. Multiple Protection -- Built in lens dust cover and o-ring sealed optics could prevent lens from dust/moisture/debris, fit for most weather and outdoor environment. Sudden changes in the weather will not eclipse your vision (Note: it can not be used in a heavy rain for a long time or soaked in the water). Ergonomic Design -- Single Hand Focus easy to hold by one hand. Helps you focus on your target quickly and accurately with one hand. Have the best view in your outdoor activities, just feel free to enjoy bird watching wildlife and scenery, hunting, hiking, camping,racing, beach, bird watching, boating/yachting, horse racing, outdoor activities, sports, theater, travel etc. Perfect Accessories -- The monocular telescope can be used with tripod and smartphone adapter for photograph and video. And it compatible with almost smartphone in market (iPhone/Android). You can capture beautiful images and share them with your friends. also you can use it for travel or send it to teens boys girls men women as a gift.