The HELIX 8 CHIRP MEGA SI+ GPS G4N is one of the Humminbird fish finders released in 2020. As opposed to the older version, the HELIX 8 CHIRP MEGA SI+ GPS G3N, it comes with a few extra features. For example, it has built-in WiFi, built-in NMEA 2000, and is compatible with the new CoastMaster charts. For reference, this is the Humminbird part number 411350-1. Key Features and … [Read more...] about Humminbird HELIX 8 CHIRP MEGA SI+ GPS G4N