Celestron SkyScout Personal Planetarium Locates and identifies over 6,000 stars, planets, and constellations with GPS technology Red LED backlit display for easy-to-read information Accepts SkyTour SD multi-media cards for interactive tours of the night sky Includes USB port for easy download of database updates Measures 7.4 x 2.5 x 4.0 inches (W x H x D)