The Celestron NexStar Evolution 8 is a user-friendly 8"" Schmidt-Cassegrain telescope with built-in Wi-Fi for observing the moon, planets, galaxies and other night sky objects. The Evolution 8 features StarBright XLT optical coating to increase light transmission, Fastar compatibility, a computerised GoTo mount and is powered by a rechargeable lithium-ion battery with enough power for 10 hours of continuous observing. Using the free Celestron SkyPortal app for iOS Android, users are able to explore the universe and control the Evolution 8 with a smartphone or tablet. The planetarium interface enables you to view the night sky in real time or display a list of celestial objects currently visible based on your time and location.