Humminbird 9-M-SILR-Y CableModel: 720102-1
Y Cable - Separates Side Imaging into Left and Right Side Beams - for Side Imaging products only. Allows the use of two side imaging transducers with one unit without the need for a transducer switch. Used in applications where the a plastic thru the hull transducer is required on a boat with a deep V hull or the motor or other items on the transom of the boat may block one side of the transducer and distort readings. 30""