High-quality optics - 360mm focal length, 50mm large aperture and fully coated optical all-glass lens provide clear, close-up images. The 360 x 50 refractor is a compact general-purpose telescope with high magnification power. It is suitable for astronomical observation and ground use.Encourage scientific love - support STEM learning through scientific exploration and practical experience. Encourage little explorers to Pursues nature's love of science!Children Science Education Astronomical Monocular TelescopeTheoretical resolution - 2.000 arc seconds, equivalent to 1,000 meters, you can see that the two objects are 0.970 cm apart. It can be set 60 times, 18 times, mirror group plus 1.5 x 90 times, 27 times. "Complete user guide - This telescope is designed for children and comes with a complete and deed instruction manual. When used by children, it is recommended to use the smallest majority to find the target, and then increase the majority of observations.