MKR-MDI-2 Humminbird HELIX MDI Sonar Adapter Cable for HELIX 7MEGA ImagingA(R) 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. Adapter connects your Humminbird HELIX 7 G3/G4 fish finder with a built-in MEGA Down Imaging transducer on your trolling motor. Connects your Humminbird HELIX fish finder to a Minn Kota 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 Compatible Units:HELIX 7 CHIRP GPS G2N*/G3NThe built-in transducer cannot supply MEGA Down Imaging to Humminbird models that do not already have the capability. If you have a G2/G2N or a G3/G3N HELIX that is not a MEGA SI or MEGA DI model, you will still get 2D CHIRP Digital Sonar from the transducer.*HELIX G2 and G2N units need to be running the latest software update to view sonar from Built-In MEGA Down Imaging motors.