Nextar S3 3.5-Inch Portable GPS Navigator 3.5 Inch Color Display with Touch Screen/ 4:3/ GPS Navigation System Built In Speaker/ Voice Guided Directions with Turn by Turn Voice Prompts Preloaded 50 U.S. States Map/ In SD Card/ 1.6 Million Points of Interest Address Book Can Store Up to 300 Addresses/ Automatically Recalculate the Route SD Card Slot for Added Memory/ MP3 Playing Mode/ Requires SD Card