Function:1. multi-layer high-definition green film, can prevent light rain or water splash, can not be used underwater, weak night vision, low light source around the observed object is visible, the stronger the light, the brighter you can see2. 10 x 52x magnification, 16x magnification with one eye and 52mm objective lens diameter, provides bright and realistic images. The telescope has a wide field of view and enjoys the best view during outdoor adventures3. high-resolution and high-contrast images, the latest optical technology, equipped with BAK-7 prism and full multi-layer coating lens, can ensure excellent light transmission and brightness, light transmission up to 99.5%4. double function, with double function (adjustable zoom front and rear), easy to focus, for precise observation to get a clear image. Provides you with an incredible viewing experience.5. non-slip grip and durable external hand guard, with anti-fog coating and O-ring sealed optical elements to prevent moisture, dust and dirt from covering the lens, keeps the telescope clean at all timesSpecificationItem type: optical telescope bifocalProduct length: 15cm * 8cm * 6cmProduct weight: 300g.Mirror body: plastic frame + environmentally friendly rubberMagnification: 10xOuter diameter of the lens 52 mm, inner diameter