The Humminbird HELIX 7 CHIRP MEGA SI GPS G3 Fishfinder features MEGA Side Imaging, MEGA Down Imaging, Dual Spectrum CHIRP sonar, AutoChart Live, GPS and the enhanced Humminbird Basemap. The 7 in., ultrawide display gives you ample room to view the many preloaded split screen view options. This Humminbird fish finder is also LakeMaster compatible!