The Celestron FirstScope 76 Accessory Kit is designed to expand your FirstScope telescope. Contains: -12.5 mm Eyepiece (1.25″ ). Increases the power to 24x. – 6 mm Eyepiece (1.25″ ). This eyepiece increases the power to 50x. -Moon Filter (1.25″). A moon filter reduces the brightness of the moon and improves contrast so greater detail can be observed on the lunar surface. The filter has threads on it which screw into the bottom of the eyepieces. -5×24 Finderscope & bracket . This finderscope with bracket makes it easier to locate astronomical objects with the FirstScope telescope because of its much wider field of view and low magnification. Installation is simple with no tools necessary. -CD-ROM The SkyX. Lets you explore and develop an understanding of basic astronomy. This planetarium software is capable of printing star charts, displaying astronomical photos, helps identify planets and stars, learn the constellations, and much more. Operating Systems: Windows XP and Vista, as well as MAC 10.4.8 and later. -Nylon Carrying Bag for FirstScope Telescope and accessories in a tote bag for easy and safe transportation.