1. Quality Optics: Featuring BAK4 prism and lens, the light transmittance reaches up to 99.5%, delivering more light into the view, reducing chromatic aberration and ghosting, and providing you with a clearer, brighter, and more colorful vision. 2. Waterproof Monocular: This waterproof, fogproof, dustproof, and shockresistant HD monocular comes with a builtin dust cover and Oringsealed optics to protect the lens from dust/moisture/dirt, ensuring longlasting waterproof performance. It is suitable for most weather conditions and environments (Note: It cannot be used in heavy rain for extended periods or submerged in water). 3. Professional Performance Monocular: Equipped with 10x power magnification and a 42mm objective lens, this monocular is ideal for birdwatching, concerts, football games, climbing, hiking, driving, wildlife, and landscape observation. It offers higher resolution, greater light transmittance, minimal distortion, and delivers bright, sharp images without color deviation. 4. Easy to Use: With this monocular telescope, you can easily and quickly observe the scenery. Adjust the eyecup and focus wheel until you achieve a clear and bright image. The included smartphone mount and extendable, stable tripod allow you to effortlessly capture HD photos or videos.