1. contrast and resolution images: precision design with tier fullglass optics (BAK4 prism and multilayer coating). This quality monocular telescope offers greater light transmission and brightness, producing clear and vibrant images. 2. Comfortable and ergonomic design: The ergonomic design allows for quick and precise onehanded focusing. The durable textured rubber armor ensures a comfortable grip, antislip handling, and longlasting external protection. 3. HD focus telescope: Our monocular features fully multicoated lenses, equipped with 10x magnification and a 25mm wideangle objective lens. The large eyepiece provides a broad field of view for an immersive viewing experience. 4. Waterproof monocular: This waterproof, fogproof, dustproof, and shockresistant HD monocular comes with a builtin dust cover and Oringsealed optics, protecting the lens from dust, moisture, and dirt while ensuring longlasting waterproof performance. It is suitable for most weather conditions and environments (Note: It should not be used in heavy rain for extended periods or submerged in water).