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[40X60HD High-Performance Monocular Telescope] The 40x BAK4 Porro prism cuts stray light and improves color reproduction to 99.99%. It also features an optical multi-layer green film coating (FMC), providing high light transmission and brightness, allowing for a three-dimensional and bright field of view even in dimly lit venues such as concerts, making everything clear. It also works well at dusk and on cloudy, foggy, or dark days. [Great for a Wide Range of Scenes] The 40x magnification and 60mm objective lens field of view are perfect for enjoying live performances, mountain climbing, bird watching, theater, opera, horse racing, scenery, nebulae, sports viewing, athletic meets, constellations, outdoor activities, wild birds, the moon, airplanes, the night sky, travel, stargazing, meteor showers, Nojima, figure skating, landscapes, baseball, soccer, safaris, and the sea. [Waterproof, Fog-proof, and Shockproof] To prevent slipping, shock, moisture, dust, and debris from entering the monocular lens, the optical components are sealed with a lens dust cover and O-ring, allowing it to be used in various weather conditions and situations. It also has a hole for a strap, making it easy to carry. [Compatible with Many Devices & Easy to Use] The smartphone adapter is compatible with iPhone 12, 12 Pro, 11, 11 Pro, Xs, X, 8p, 8, 7p, 7, 6, 6p, Samsung S10 / S10p, S9 / S9p, S8 / S8 Edge, S6 / S6 Edge, Note, LG, HTC, Sony, and more. No special setup is required, making it easy for children and beginners to use.