Setting new standards for value, this professional-grade unit has high-tech upgrades for greater clarity and fish-tracking performance. Its high-definition 5" TFT color LCD has vivid 640V x 640H resolution for brilliant clarity, even in direct sunlight. DualBeam PLUS™ sonar combines two selectable, fish- and structure-tracking beams for precision viewing at many depths. The narrow 20° beam provides excellent bottom detail and spots fish hidden in clutter. The wide-angle 60° beam scouts a large area for surveying fish in many directions and picking up large schools of fast-moving baitfish. 4,000 watts peak-to-peak power. The 788c comes with an external, 16-channel WAAS-enabled GPS receiver to aid navigation and help mark hot spots. The GPS unit displays data conveniently on the 788c screen.