Y Cable - Separates Side Imaging into Left and Right 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. Can also be used if the motor or other items on the exterior of the boat may block one side of the transducer and distort readings. DOES NOT SUPPORT MEGA SIDE IMAGING.