The Humminbird Helix 7 Chirp MDI GPS G4 fish finder features MEGA Down Imaging, Dual Spectrum CHIRP Sonar, AutoChart Live, Internal GPS and Humminbird Basemap built-in. An upgraded high-definition 7" display will give you the best view of the many pre-loaded split screen view options so that you'll never miss a fish.Specifications and Features: Keypad control MEGA Down Imaging Dual Spectrum CHIRP sonar Internal GPS and Humminbird Basemap Premium Chart Compatible AutoChart Live 1-Year Limited Warranty