The 788c Combo features a brilliant color, ultra-high resolution 640V x 640H 5" display, DualBeam PLUS sonar with 4000 Watts PTP power output, GPS Chartplotting with built-in UniMap, and advanced Fishing System capabilities. In addition, it includes dual card slots for maps and saving waypoints, as well as 3 programmable preset buttons to save your favorite views. Maximize your angling experience with the Humminbird 788c fishfinder GPS system.