Compact navigation system combines GPS technology with a built-in MP3 player; Includes a SD card pre-loaded with maps of the United States and Canada; Clear turn-by-turn directions keep you on-track, while the automatic re-routing function easily navigates around detours and other obstructions; Choose the route that's best for you and travel via highways, major roads, or local roads; 3D and 2D map orientation gives you a clear view of your location and destination; Dimensions: 3.56 x 2.95 x 0.95 inches (W x H x D);