10-30x42 High Power Magnification: With full 10-30x magnification and 42mm object lens diameter, monocular for adults & kids, for crystal clear image, enjoy the magnified view for all sorts of outdoor adventures: bird watching, hiking, camping, traveling, wildlife, scenery, etc;Waterproof Monocular: This HD waterproof, fog-proof, dust-proof, shockproof monocular, built in lens dust cover and o-ring sealed optics could prevent lens from dust/moisture/debris, ensures the living waterproof function, fit for the most weather and environment(note: it can not be used in a heavy rain for a long time or soaked in the water);High Quality Optics: With BAK4 prism and lens, light transmittance reaches up to 99.5%, vers more light to the view, reduces chromatic aberration and ghost images, give you clearer, brighter and more colorful view;Widely Compatible with Smartphone: Love to share what you see with friends and families The smartphone holder perfect for almost all the smartphones on the market. Easy installing and easy sharing, a good candidate for your next trip;Easy to Use: You can see scenery Easily and Rapidly by using our monocular telescope for Single Hand-Adjust the eye cup and Focus Wheel until see clear and bright image