Humminbird 408130-1 788ci HD DI Combo Fishfinder/GPS (Discontinued by Manufacturer) 5-inch display Dual-beam Switchfire Sonar with precision 20-degree beam and wider 60-degree beam; view beams separately, side-by-side, or blended together. Chartplotter/fishfinder with high-resolution, LED-backlit color display, DualBeam sonar with 4000 Watts PTP power output Real-time Sonar always updates at the fastest rate possible, shows returns from the bottom, structure, and fish that are within the transducer beam Included UniMap covers the continental U.S. coastline, inland lakes, and rivers at 30 meters per pixel resolution Includes ContourXD by Navionics, an enhanced, professional mapping package with over 3,000 U.S. lake maps in the database 500 Watt, 200/455KHz Dual Beam Fishfinder and 455/800KHz Down Imaging Sonar 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 Real-time Sonar always updates at the fastest rate possible, shows returns from the bottom, structure, and fish that are within the transducer beam Included UniMap covers the continental U.S. coastline, inland lakes, and rivers at 30 meters per pixel resolution Includes ContourXD by Navionics, an enhanced, professional mapping package with over 3,000 U.S. lake maps in the database