✅【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, providing a clear view. It also works well at dusk and on cloudy, foggy, or dark days. ✅【Wide Range of Scenes】The 40x magnification and 60mm objective lens field of view are ideal for 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, starry skies, meteor showers, Nojima, figure skating, landscapes, baseball, soccer, safaris, and marine use. (Especially recommended for those passionate about sports!) It's also a perfect gift choice. ✅【Waterproof, Fog-proof, and Shockproof】The lens's dust cover and O-rings seal the optical components inside to prevent slippage, shock-resistant grip, moisture, dust, and debris from entering the monocular lens, allowing it to be used in various weather conditions and situations. It has a hole for a strap, making it easy to carry. ✅【Compatible with Multiple 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 installation is required, making it easy for children and beginners to use.