1. High Definition Prism - zoom telescope is equipped with a BAK-4 prism and a fully multi-coated lens that guarantees excellent light transmission and brightness. The light transmission reaches a visibility of up to 99.5%. The built-in low light night vision helps you see things in low light, high definition without the dizziness. 2. Large caliber monocular telescope - with lens and large field of view for clear and comfortable view The sturdy rubber exterior with rubber grips makes it convenient to use and prevents it from slipping out of your hands. Nitrogen-filled waterproof material with anti-fog coating and O-ring-sealed optics prevents moisture, dust and dirt. 3. Rotatable eyecup - You can adjust the distance of the eyecup according to your needs. It's easy to use and quick to focus. Ergonomic design helps you focus quickly and precisely on your goal with one hand. The sturdy rubber exterior with rubber handles makes it comfortable to use and prevents it from slipping out of your hands. 4. Anti-slip texture treatment of the body - Our monocular telescope comes with the latest quick-align smartphone holder and an aluminum alloy telescope mount. Perfect for and various smartphones on the market. Easy to install, it offers HD pictures or videos to share your beautiful and amazing moments with your family and friends. 5. Wide Applications - The monocular is perfect for fishing, traveling, hunting, playing ball games, going to concerts, bird watching and other outdoor activities.