Humminbird 798ci SI Combo 5-Inch Waterproof Marine GPS and Chartplotter with Sounder Chartplotter/fishfinder with high-resolution, 5-inch, LED-backlit color display, DualBeam sonar with 4000 Watts PTP power output Dual-beam Switchfire Sonar with precision 20-degree beam and wider 60-degree beam; view beams separately, side-by-side, or blended together Side Imaging Sonar delivers amazingly clear, picture-like images of fish, bottom, and structure; Down Imaging shows detail below the boat Real-time Sonar always updates at the fastest rate possible, shows returns from the bottom, structure, and fish that are within the transducer beam Includes ContourXD by Navionics, an enhanced, professional mapping package with over 3,000 U.S. lake maps in the database