Schmidt-Cassegrain telescope with built-in WiFi. You no longer need a hand controller - simply align the telescope to the most beautiful celestial objects with a click on your smartphone or tablet. Connect your mobile device to the wireless network of your NexStar Evolution telescope and explore the universe with the free Celestron SkyPortal app for iOS and Android. This planetarium program shows you the current view of the sky or a list of observation targets for your location. The user-friendly SkyAlign is integrated into the Celestron app, allowing you to set up the telescope in just a few minutes and align it with three reference stars. The durable LiFePO4 battery easily lasts through a night of observation. Control your telescope wirelessly with your iOS or Android smartphone or tablet via the free Celestron SkyPortal app. Computerized GoTo mount with high-performance brass worm gears for improved tracking accuracy and reduced backlash. Rechargeable lithium iron phosphate battery with enough power for up to 10 hours of observation. Enhanced design features include manual clutches, integrated carrying handles, two accessory trays, and a USB port to charge smartphones or tablets.