【Specific Application】 Part Number: 1852086. The MKR-MDI-2 Adapter Cable is compatible with Humminbird HELIX 7 G3, G3N, G4 and G4N models. 【Strong Functions】 The 1852086 Transducer Adapter Cable connects your Humminbird HELIX 7 G3 or G4 fish finder with a built-in MEGA Down lmaging transducer on your trolling motor, you'll be able to scan deeper and wider without sacrificing clarity. 【Great Features】 The MKR-MDI-2 Adapter Cable (7-Pin) is made of high-quality rubber, plastic and steel. Marine-grade Shielded cable for crystal-clear MEGA Down Imaging sonar performance. Ensures best possible sonar presentations. Waterproof for extra dependability. With strong durability, corrosion resistance and anti-rust performance. Better quality allows the items to be used for a longer time. 【Kind Tips】 The 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. The HELIX G2 and G2N units need to be running the latest software update to view sonar from Built-In MEGA Down Imaging motors. 【100% Satisfaction Guarantee】 We are committed to providing excellent products and the best service for our customers. If you are not satisfied with the product, you can simply return it. We support a 30-day refund on return and a 12-month warranty. 1852086 Replace for MKR-MDI-2 Humminbird Helix 7 G3 and G3N MEGA Down Imaging Adapter Cable, 1852086