【80x100 High Magnification Monocular】Can be used in combination with a mobile phone, with a maximum magnification of 80x and a 50mm objective lens diameter, adopting full multi-layer coated lenses to improve light transmission and resolution. Provides clear, bright images and a different field of view. 【BAK-4 Prism and FMC Lens】High-quality precision design, high-grade all-glass optical components, BAK-4 prism and FMC lens are a powerful combination. BAK-4 prism with high refractive index, excellent transparency and minimal scattering provides an incredibly clear and bright view. 【Waterproof & High Quality】This monocular not only has a high-quality optical system, but also has nitrogen filling, is waterproof, and has a built-in lens dust cover to protect the lens from dust/steam/debris, allowing you to see details clearly. The shock-resistant surface and durable external protection can withstand harsh weather conditions. 【Wide Compatibility】The monocular can be easily used with one hand. The monocular design allows those who wear glasses to get closer to the eyepiece without affecting their field of view, making them feel more comfortable. In addition, there is a tripod connector at the bottom of the monocular, and attaching the monocular to a tripod provides a stable view. Suitable for many types of smartphones on the market. Can be used by adults and children. 【Wide Range of Uses and Satisfaction Guarantee】The HD monocular is perfect for hiking, hunting, climbing, bird watching, wildlife observation, scenery, etc. It is also a great gift for family and friends who love the outdoors.