Humminbird 717 5-Inch Waterproof Fishfinder Maximum resolution and power with pro-grade performance, expandable and upgradeable fishing system 5-inch, high-definition display with 320 x 320 pixels of resolution and 16-level grayscale 60-degree, and 20-degree beam for both fish location better bottom definition to 1,000 feet Water temperature and speed capability included, and GPS ready Measures 6.9 x 7.7 x 4.5 inches (W x H x D), and backed by limited 1-year warranty