1. High Definition Prism - This zoom telescope is equipped with a BAK-4 prism and fully multi-coated lenses that provide excellent light transmission and brightness. Light transmission reaches up to 99.5%, ensuring clear and bright images. The optical system performs well in low-light conditions, delivering sharp, high-definition views.2. Large Caliber Monocular Telescope - Features a large objective lens and wide field of view for clear, comfortable viewing. The durable rubber armor provides a secure, non-slip grip. Nitrogen-purged construction with O-ring sealed optics ensures waterproof and fog-proof performance, protecting against moisture, dust, and dirt.3. Rotatable Eyecup - Adjustable eyecup allows for customized eye relief. Smooth focus mechanism enables quick and precise focusing. Ergonomic design allows for easy one-handed operation. The rubber armor ensures a comfortable grip and prevents slipping.4. Anti-Slip Body Design - Textured surface provides enhanced grip. Includes a smartphone adapter and aluminum alloy mounting bracket compatible with most smartphones. Easy to install, allowing you to capture and share high-definition photos and videos of your outdoor experiences.5. Wide Applications - Ideal for outdoor activities such as bird watching, hunting, hiking, traveling, attending concerts, sports events, and sightseeing.