HELIX 15 CHIRP MEGA SI+ GPS G4N CHO Display OnlyThe HELIX 15 CHIRP MSI+ GPS G4N CHO features a 15.4" display, MEGA Side Imaging+, MEGA Down Imaging+, Dual Spectrum CHIRP Sonar and internal GPS with Humminbird Basemap. As with all HELIX G4N models, this HELIX 15 includes standard features such as AutoChart Live, Wi-Fi and NMEA 2000, in addition to Bluetooth and Ethernet networking for compatibility with the One-Boat Network family of products from Humminbird, Minn Kota and Cannon. This CHO (Contr