Key Specifications/Special Features: All-in-one car/portable navigation system with software, maps (depend on countries), GPS and car mount 4 inches TFT, with touch screen MP3 and MP4 function Built-in rechargeable Li-ion battery SD card slot for added memory/USB2.0 MP3 song playing mode (requires SD card, not included) 2D or 3D map viewing modes Day and night modes-night mode Features additional light on the screen Automatic calculation on driving distance and time Turn by turn voice prompts Option: SD card, GPS external antenna, map, home adapter and navigation software Operation System: Windows CE NET4.2