This 90mm Maksutov-Cassegrain telescope is a fully GoTo telescope. It's on board computer knows the night sky. After a short alignment, your telescope will be ready to take you on a tour of the universe. This telescope has a folding optical assembly that uses a combination of mirrors and lenses to pack an incredible 1200mm focal length in a compact 12.5 inch optical assembly. With a powerful magnification of 155x when using the 9mm eyepiece, this telescope is great for backyard astronomy. The big magnification will give you jaw dropping views of the moon. With planets you can see the Rings of Saturn and the Moons of Jupiter and great views of Mars. In dark skies you can see distant nebulae and galaxies as well. The iOptron SmartStar-E Alt-Azimuth Mount, a.k.a. The Cube, is probably the most functional and flexible unit on the market. Both axis motors are built into a small single unit. In addition, there are no "dead spots" -- so you can point your telescope anywhere above the horizon, whereas, other mounts block the telescope tube at certain points of rotation. This mount also comes standard with AC connection. The mount also accepts 8 AA cell batteries for use at home or in the field (Batteries sold separately). The revolutionary GoToNova computerized control system is the most technologically advanced automated tracking system available on the market today. With a database of 5,000 celestial objects, including all of the most famous galaxies, nebulae, star clusters, not to mention the planets, you'll be able to enjoy star gazing with the simple push of a button. The GoToNova Controller is much easier to use than other similar products. The hand controller is more intuitive with menu categories better organized. It also has a larger LCD screen with more lines of content compared with the competition. Using the easy-to-use hand controller, you can easily set up your telescope and select where you want to go.