FMC multi-layer coating, BAK4 prism: FMC multi-layer HD coating provides up to 99.5% light transmission and minimal aberrations, minimising light loss due to reflections; BAK4 prism's excellent refractive index effectively avoids dark corners, resulting in clear and bright images without dark edges. Large eyepiece binoculars for larger images and clearer detail: 22mm eyepiece diameter, 42mm objective lens diameter, 12x magnification, giving you a 114/1000m field of view. The large eyepiece makes full use of the 12x magnification to provide a larger image and ensure clearer details. Portable and waterproof: rubber-wrapped body with a delicate feel and non-slip thumb design for a more secure grip; environmentally friendly rubber, odourless, excellent sealing properties, wear-resistant, moisture-proof, water and fog-proof, impact-resistant, highly durable for outdoor use. However, do not immerse the binoculars in water. HD binoculars with universal mobile phone adapter: fast alignment, compatible with mobile phone cases, portable and stable. Perfect for bird watching, hunting, hiking and sports: the HD binoculars come with fully multi-coated lenses and 18mm BaK4 prisms for excellent brightness, clarity and definition. Take advantage of a great viewing experience, especially when bird watching, hunting, hiking and sporting. Product Highlights: Large eyepiece, BAK4 prism, FMC multi-layer green film, wide-angle eyepiece design, high-definition 2. Accessories: manual, wipe, nylon bag with strap, coloured case, eyepiece cover, objective lens cover, lanyard