Adult 21x30 monoculars, equipped with high-power low-light prism and green coated lenses. Allow more light transmission and obtain more brightness. 30mm green coated lens. All these elements of the scope can provide high-definition images and aurate color reproduction. It is a good choice for bird watching, hunting, hiking, camping, sightseeing, etc. The scope can be connected with a mobile phone to take pictures/videos. Explore the nature of the world easily through the sn. And this phone adapter is Used for most phone models (width between 57-80mm), (because only one lens can be fixed, it may not match well). Help you observe things in the distant world through more realistic details and share them with your friends and family.br/ br/ 21X30 Monocularbr/ specification:br/ br/ Magnification: 21 times (fixed to 21 times, not adjustable)br/ Objective lens: 30mmbr/ Prism type: high power low lightbr/ Coating: green coated lensbr/ Weight: 1000 gramsbr/ br/ 1 x br/ 1 x lens capbr/ 1 x cleaning clothbr/ 1 x handbagbr/ 1 x hand strapbr/ Tips:br/ br/ Please do not use this monocular to look directly at the sun, otherwise it will hurt your eyes.br/ If you do not use it for a long time, please keep it in a dry place.br/ Even if it is waterproof, store the monoculars in a dry place. It can resist light water, but it cannot be used in heavy rain or immersed in water for a long time.br/ Please wipe the lens with a clean dry cloth. If there are stubborn stains, please wipe with a cloth dampened with alcohol. This will be easily deleted.br/ The width of the mobile phone adapter is 57-80mm, which is Used for almost all mobile phones on the market.br/ Monoculars will help you see things in low light, but cannot help you see things in total darkness.br/ When the mobile phone is connected with a single scope telescope, the picture is a circular view with black surroundings. Please enlarge the picture and you will get