1. Purpose: The 80 x 100 monocular telescope is designed for various outdoor activities. It has 80x magnification and a 100mm objective lens. The monocular features a fully multi - coated lens to increase light transmission and resolution. It is suitable for outdoor sports and wildlife exploration, and is portable and useful for bird watching, wildlife observation, hunting, hiking, mountaineering, camping, and travel. 2. [Wide Field of View] The 80X100 monocular telescope has a high - end field of view, providing a true 80 x 100 field of view. It uses FMC Superior BAK4 green film prism, making it compact and durable with a precision design. 3. [Ideal for outdoor activities] This monocular is especially suitable for outdoor enthusiasts. It is suitable for various outdoor activities such as hunting, animal observation, mountaineering, camping, traveling, hiking, water sports, ball sports, sightseeing, driving, concerts, and observation. It can offer a great visual experience. 4. 【High Contrast and High Definition Image】 The zoom telescope is equipped with BAK - 4 prisms and fully multi - coated lenses, which ensure good light transmission and brightness. The light transmission visibility can reach up to 99.5%. The built - in night vision low light function helps users see things clearly in the dark. The adjustable eyecup allows for easy up - and - down adjustment for optimal viewing, even when wearing glasses. 5. 【Wide Compatibility】 - It is not only suitable for people who wear glasses. The design of this monocular telescope allows users to get closer to the eyepiece without sacrificing the viewing experience and feel more comfortable. - It is equipped with a mobile phone holder and is suitable for most smartphones on the market. - It can be used by both adults and children.