1. High Definition Prism - This zoom telescope features a BAK-4 prism and fully multi-coated lenses that provide excellent light transmission and brightness, with up to 99.5% visibility. The low-light performance enhances clarity in dim conditions for a sharp, clear image.2. Large Caliber Monocular Telescope - Designed with a wide lens and broad field of view for clear, comfortable viewing. The durable rubber armor provides a secure, non-slip grip. Nitrogen-purged and O-ring sealed to resist fogging, moisture, dust, and debris, making it waterproof and reliable in various conditions.3. Rotatable Eyecup - Adjustable eyecup allows for customized eye relief. Easy-to-use focusing mechanism enables quick and precise targeting with one hand. The ergonomic design ensures comfortable handling and a secure grip.4. Anti-Slip Body Texture - Features a non-slip rubberized surface for added control. Includes a smartphone adapter and aluminum alloy mount compatible with most smartphones. Simple to install, allowing you to capture and share high-definition photos and videos of your outdoor experiences.5. Wide Applications - Ideal for birdwatching, hunting, hiking, traveling, attending concerts, sports events, and other outdoor activities.