My experience with the US2 Sonar was it would only read traditional Sonar. No chirp, no downview, no split frequency. It is only a 4 pin cable. I connected a better transducer when I was running a Garmin on it at first. Finally bit the bullet and replaced it with the transducer that comes with my Helix 10 Mega Chirp gps g2n now mounted on the deck. Since I have an Ulterra I got an aftermarket cable guard and mounted the transducer. Now I have everything but the kitchen sink. I took the cover off the Ulterra and unplugged the transducer wire for the US2 and threw it away. If you need parts call David Goodson at shut-up-and-fish.com. He knows everything and will help you out. Hope that works.
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