It's a toy telescope for science education or hobby,not a professional astronomical telescope.Telescope common sense : Please keep in mind that under any condition,do not look directly at the sun through a finder or main tube,it is only suitable for night view stars moon.It contains small parts,do not suitable for children under 5 years old,do not put it into the mouth to avoid inadvertently swallowed and danger of suffocation,and away from the fire.Maintenance : Pay attention to dust,wipe with a soft cloth,do not use in dusty placesSpecification:optical aperture: 50mmEyepiece: H20mm,H6mm two eyepiecesMain tube Color: SilverTripod most highly: 37cmMaterial: AluminumPackage Contents: 1 x Astronomical Telescope2 x Eyepiece