The Lowrance 500c is a portable color GPS navigation system shows you the way to any destination across town, or across the U.S. and Canada. Pick your destination and the 500c automatically displays the best route, and gives you turn-by-turn directions with voice and visual guidance. The 500c substantial 20GByte internal hard drive, with 10GBytes allocated to built-in, high detail mapping and 10GBytes reserved for MP3 music storage.