Why is it worth buying?✦As the best choice for children as gifts, it can bring surprises to children.✦The telescope has 20x-60x eyepieces, which can better see the celestial bodies near the earth.✦The telescope is equipped with a tripod, and the height can be adjusted arbitrarily, which is convenient for people of different ages to use the telescope.✦It is conducive to the physical and mental health of children. It can cultivate children's interest, improve their concentration and attention, guide children to think, and help them develop their ability to learn to think.Specification:OpticsType: RefractorBuild type:Double-peak air interval achromatic 3. Glass grade: S-FPL51Aperture: 102mm/ 4.01 inches 5. Focal length: 714mm 6. Aperture ratio: f/7 7.Resolution capacity: 1.17"Limit value: 12.1Concentrating ability: 212x 10.Maximum useful magnification: 204xTube outer diameter: 121mmTube material: aluminumCoating: SMCFocuser: 1Build type: RAP ((rack and pinion)Connection: 2 inchesConnecting threaded sleeve: M54*0.75Ring clip: YesRotation: YesGear reduction: 1:10 fine movementThe package includes:1. Astronomical telescope *12. Paired telescope tube rings *13.2" -1.25" adapter *14. Dovetail board*15. Lens cap *16. Dust cover*1Notice✦Manual measurement may have a little dimensional error.✦Due to the different lighting effects and monitor settings, the actual color may not be exactly the same as the picture color.