Control Head Only Model: Unit sold without transducer; compatible with Minn Kota trolling motors with Built-in MEGA Imaging, MEGA 360 Imaging accessories, or existing Humminbird Ethernet network sonar sharing Comprehensive Navigation: Internal GPS with Humminbird Basemap includes coverage of 10,000+ lakes and continental U.S. coastlines; compatible with premium LakeMaster, CoastMaster and Navionics charts Advanced Sonar Capabilities: MEGA Side Imaging+ and MEGA Down Imaging+ provide detailed underwater views up to 250 feet under and out to either side of your boat; Dual Spectrum CHIRP sonar delivers 2D target separation and fish clarity Real-Time Mapping: AutoChart Live creates maps of depth contours, bottom hardness, and vegetation while boating with eight hours of built-in recording time; compatible with AutoChart Zero Line SD cards Full HD Display: 1920 x 1080 resolution screen with touchscreen and keypad controls; customize settings and views using the sidebar menu for a personalized fishing experience