Lowrance iFinder H20 C Plus 2.83-Inch Waterproof Marine GPS Features a built-in background map, including interstate exit services, of the continental United States and Hawaii Includes one MMC/SD digital media memory card slot for mapping and recording capabilities Reliable, powerful, and user-friendly, the H20 C Plus features easy point-and-map operation for navigation 16-channel GPS and WAAS-enabled handheld helps get you where you're going quickly and easily