This Sonar Adapter Cable is designed for Hummingbird HELIX 7 G3 or G3N G4, and G4N fish finder. Uses high-frequency sonar so you can easily distinguish fish from structure, see the direction fish are facing and even target individual species. And now with MEGA Imaging+, you'll be able to scan deeper and wider without sacrificing clarity Connects your Humminbird HELIX fish finder to motor equipped with Built-In MEGA Down Imaging, Shielded cable for crystal-clear MEGA Down Imaging sonar performance Compatible with HELIX 7 models,Adapter not required for SOLIX models,Cable length: 30 inches MKR-MDI-2 Sonar Adapter Cable for Humminbird HELIX 7 G3 or G3N G4, G4N Fish Finder #1852086