Match the pin count on the sonar port of your sounder
Transom Mount: These are attached to the back (transom) of a boat hull. Alternatively, use the included equipment to install on a trolling motor.In-hull: An in-hull transducer is installed inside a boat hull against the bottom
77/200 kHz sonar transmits a single ping at either 77 or 200 kHz50/200 kHz sonar transmits a single ping at either 50 or 200 kHzHigh-wide CHIRP has a frequncy range of 150-240 kHz in each transmission
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