The eMap features an internal basemap containing information on North and South America including state and country boundaries, lakes, rivers, streams, airports, cities, towns, coastlines, and U.S., state, and interstate highways. In addition, the eMap provides exit information for the federal interstate highway system. With the eMap, you will know when you are near services such as food, lodging, and service stations. The eMap is compatible with Garmin's complete line of downloadable MapSource CD-ROMs including U.S. Roads and Recreation, WorldMap, U.S. Topo, and MetroGuide U.S.A. When paired with the MetroGuide U.S.A. CD-ROM, the eMap has the ability to look up address and telephone number information for nearby services and points of interest. The eMAP will store eight or 16 megabytes of downloaded CD-ROM information at a time depending on the size of the cartridge you use in the unit.