Humminbird 383c Combo 3.5-Inch Waterproof Marine GPS and Chartplotter Full-featured fish finder with 16-channel WAAS GPS receiver with chartplotting, temperature, and speed 3.5-inch, high-resolution, 256-color TFT LCD display with 320 x 240 pixels of resolution Built-in 4 nautical mile resolution UniMap of USA inland lakes, rivers and coastal areas DualBeam PLUS Sonar with 20- and 60-degree beams is reliable to 1,000 feet Measures 5.25 x 7.4 x 4 inches (W x H x D), and backed by one-year limited warranty