10-30 Magnification & 50mm Objective Lens10-30X Zoom with adjustable magnification ranging offers you greater flexibility. The 50mm objective lens provides more sufficient supplementary light and a larger field of view.FMC Multi-Coated Green Film LensHD Monocular equipped with advanced FMC full broadband green film anti-reflective technology, BAK4 prisms, and ED lenses ,with 99% light transmission, reducing chromatic aberration and ghosting and improving image reproduction and edge-to-edge clarity.Support Low Light Night Visions for Your AdventuresWith its superior light transmittance efficiency, this monocular provides a clear image even when you're exploring at night. Its FMC green film-coated lens collects and reflects light at night, so it works as long as there is a light source to your target.Smartphone Adapter for More ExperienceTo hold the handheld compact monocular telescope more securely and have stable images, we recommend you to use it with the included sturdy phone adapter so you can capture all the amazing views by filming photos or videos. It's compatible with most smartphones including Android and iOS phones, ensuring a wide range of use.Durable Waterproof and Fog-proof Camping MonocularThis zoomable monocular is durable and shockproof, which is perfect suitable for hunting,birding and other outdoor sports. Full of the high-purity nitrogen in mirror,waterproof and anti-fog. You can use it in any humid environment. No worry about rainy.