The Humminbird HELIX 12 CHIRP MEGA DI+ GPS G4N Fish Finder features an 12.1 in. display, dual spectrum CHIRP sonar and internal GPS with Humminbird Base map. As with all HELIX G4N models, this HELIX 12 includes standard features such as Auto Chart 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.