Professional HD 40X60 Monocular: The monocular lens adopts BAK4 prism and FMC multi-layer lens coating, this broadband multi-layer coating makes the mirror have high light transmission, clear and bright colors, giving you a true high-definition viewing experience. Professional 3 Settings: This telescope has three main settings: focal length, interpupillary distance and diopter.Focus adjustment is used to adjust the sharpness of the subject.With the diopter adjustment, the left and right eyes have the same clarity, and the interpupillary distance adjustment is suitable for the comfort of different groups of people, such as B.glasses wearers and children. Rubber appearance and texture non-slip: The body of this monocular is made of rubber with a non-slip pattern, which is shockproof, drop-resistant and stable in the hand.Pay attention to the protection of the lens and cover the protective case when not in use to prolong the life of the monocular. Lightweight and portable: Our telescope weighs about 310 grams, so it is very easy to use and not easy to tire.Equipped with a wrist strap, it is easy to carry and not easy to fall off in the open.It is ideal for outdoor sports enthusiasts and nature explorers, and is an essential portable device for bird watching, wildlife watching, hunting, hiking, climbing, camping, concerts, games, football and more. Only ships the observation telescope