Celestron 21024-A FirstScope Telescope with Accessory Kit 12.5 mm Eyepiece - 1.25" - Increases the power to 24x which makes it easier to find and observe some objects that require more magnification. 6 mm Eyepiece - 1.25" - increases the power to 50x which boosts the magnification up higher to see more detail of faint objects. Moon Filter - 1.25" - reduces the brightness of the moon and improves contrast so that greater detail can be observed on the lunar surface. 5x24 Finderscope & bracket - will make it easier to locate astronomical objects with the FirstScope telescope CD-ROM - "The SkyX" - Lets you explore and develop an understanding of basic astronomy.