Humminbirds 9 M SIDB Y Cable takes the hassle out of hooking two transducers up to one unit. Bypassing the need for a transducer switch allows high-speed bottom tracking. Compatible with dual-beam transducers and Side Imaging products only. Includes support for MEGA Side Imaging. 30L. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Cables.