The Celestron NeXStar Evolution 9.25"" Schmidt-Cassegrain Telescope is a powerful, versatile and user-friendly Schmidt-Cassegrain style telescope that can be used for observing everything from the Moon and planets to deep sky objects like galaxies and nebulae. Using Celestron's improved proprietary StarBright Xlt multi-coating system, light transmission is increased throughout the entire optical path with anti-reflection multicoated lenses, highly reflective multicoated mirrors and 4-element rare-earth glass. While the focal ratio is a slow f/10, the scope's precision tracking system allows it to be a competent astrophotography/astroimaging platform for the Moon and planets.The Evolution comes with two ways to use and control it. There is the 4-line 18-character NeXStar computer controller. This is a wired piece of hardware with a database of over 40,000 celestial objects plus several astronomical catalogs including the Messier and Caldwell. To expand the usability of the scope, download Celestron's free Navigator app for Android and iOS smartphones and tablets. The scope's Wi-Fi provides the connection to the app and expands the capabilities and functionality. Whether using the controller or mobile device, the system can assist in properly aligning the scope, provide tours of the objects and events visible whenever and wherever the user if viewing and allows for manual direction and slew control.Designed for portability, the Evolution features a long life lithium-ion phosphate battery providing up to 10 hours of continual use on a single charge. The scope comes with an Ac power supply with plugs. The battery powers the servo motors, auxiliary accessory ports, a Usb charging port and the built-in Wi-Fi. Manual clutches in both altitude and azimuth enable users to manually move and point the telescope when it's powered off.bbc Sky at Night MagazineCelestron's signature telescopes reach a new level with NeXStar Evolution 9.25, the first Schmidt-Cassegrain telescope with integrated Wi-Fi. Leave your hand control behind and slew to all the best celestial objects with a tap of your smartphone or tablet. Connect your device to NeXStar Evolution's built-in wireless network and explore the universe with the Celestron mobile app for iOS and Android. Use the planetarium interface to view the night sky in real time or display a list of celestial objects currently visible based on your time and location. The SkyAlign alignment procedure is built right into the Celestron mobile app, so you're ready to observe within minutes.The most user-friendly telescope everCelestron engineers designed NeXStar Evolution based on years of customer feedback. It offers many thoughtful design features that combine to provide you the best possible experience out under the stars. Forget about batteries or an external power supply. For the first time ever on a consumer telescope, NeXStar Evolution includes its own built-in battery. With this ultra-long life lithium-ion phosphate battery, you'll be able to enjoy stargazing marathons up to 10 hours on a single charge. You can even use NeXStar Evolution's Usb charge port to top off the other devices in your life that need to stay powered on during an observing session. An intelligent power management system senses when battery levels are low and goes into power-saving mode to keep your telescope running for as long as possible. Setting up your NeXStar Evolution is quick and painless with large, ergonomic handles.