Monocular Telescope monocular telescope. This product can meet the needs of people who are camping, exploring, watching landscapes and watching concerts. The case is made of stainless steel and the lens is made of full glass. Monocular telescope. It uses the BAK4 prism system and offers high-quality customer service. Please rest assured to buy. Monocular Product Information: Parameters:80*100 Lens material: BAK4 Coating: multi-layer coating. Mesh diameter: 20 mm. Content diameter: 50 mm. Viewing range: 246 / 1000 m. Weight:300g Precautions: 1. Monocular telescope can be used in most weather conditions and is waterproof every day, but cannot be immersed in rain or water for a long time. Therefore, do not use it in these situations. 2. Monocular telescope lenses are fragile and easy to touch. Therefore, do not hit this product with sharp objects when using. Clean the product after use and put it in a soft bag. 3. Monocular telescope. The lens can adjust the magnification. When you use the magnification, adjust it to the ideal state to make sure the picture you see is clear. 4. Monocular telescope. This is suitable for most smartphones and supports mobile photography. When you use a mobile phone to take pictures, connect the mobile phone and lens. 5. If you have any questions about the product, please send us an email in time, we will reply you as soon as possible after receiving the email.