Humminbird ICE Helix-7 CHIRP GPS G4Dual Spectrum CHIRP Sonar: See high resolution returns of individual fish, bait and structure on both the flasher and traditional 2D sonar views at greater depths and range, with target separation down to 3 4". CHIRP Interference Rejection: Six settings keep competing sonar signals from cluttering your screen, providing a clear view in both sonar and flasher modes. Adjustable Sonar Zoom: Hone in on fish, whether they are tight to the bottom, or