HD Bright ImageThe high-quality BAK4 prism and FMC multi-layer green film have a light transmittance as high as 99.9%, which reduces distortion, chromatic aberration, and ghosting, and provides ultra-clear images even in low-light environments. Excellent for bird watching, near (3.3 yards of garden) or far (1200 yards of sky). Portable and LightweightThe monoculars for adults have the compact size and weight of a smartphone, come with a carry case, hand strap and lanyard for handy to carry around. Specially designed for bird watching, hiking, climbing, wildlife spotting, countryside views, ball games, concerts, and more, great for gift giving. Easy to FocusDual focus rings allow for smoother and more accurate focusing. The 10x magnification and 42mm objective lens diameter means less shake. The large 22.5mm eyepiece provides a wider field of view. The Monocular 10X42 Brings you exceptional quality, truly sharp images and fast focusing. Compatible with Other AccessoriesThe monoculars for adults bird watching are suitable for various smartphone holder, and the tripod thread interface is compatible with other large photographic tripod bolts , i.e. standard 1/4"-20 BSW thread. Allows you to take pictures and record wonderful moments at any time and share with family and friends.