Humminbird AS ECX 30E Ethernet Cable Extender - 8-Pin - 30' [760025-1]AS ECX 30E Ethernet Cable Extender 8 Pin 30' The Ethernet Extension Cable is a 30' cable that allows you to extend the length of your ethernet cables. WARNING: This product can expose you to chemicals including LEAD which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings. ca. gov. Owner's Manual (pdf)