Celestron 93973 Skyportal Wifi Module, Black Align and control your telescope wirelessly using your smartphone or tablet and Celestrons free SkyPortal app for iOS and Android devices. Tap any celestial object you see in the sky to identify it instantly. Tap again and your telescope slews to that object, centering it perfectly in the eyepiece. Explore 100,000+ objects in SkyPortals database. While you observe, view astroimages and listen to audio descriptions for hundreds of the most popular objects including the planets, Orion Nebula, Hercules Globular Star Cluster, and more. Sky Tour feature generates a list of all the best stars, galaxies and nebulae to view based on your exact time and location. WiFi module is compatible with all current Celestron computerized telescopes and select older models. Unit does not require batteries or external power.