High-resolution, 4 inch color display; CHIRP sonar plus downs can imaging the power of today"s leading Fish finder technologies combined to provide the best possible view beneath boat; downs can overlay technology overlays downs can Imaging onto chirp sonar; advanced signal processing (ASP) reduces need to manually adjust settings to see fish, structure & bottom detail more clearly; track back to review recorded sonar history including structure, transitions or fish targets, then pinpoint locations; view multiple CHIRP ranges from a single transducer; CHIRP sonar performance with a greater number of affordable transducers, including the Lowrance HD skimmer; view multiple CHIRP sonar settings on 1 display; convenient page selector menu with quick access to all features using 1-thumb operation; multi-window display lets you quickly choose from pre-set page layouts, including 3-panel view;