Extend Your Transducer Cable: 30-foot extension cable provides extra length for rigging transducers on larger boats Fish Finder Compatibility: Works with all HELIX Series products and many legacy Humminbird models manufactured after 2001 Flexible Rigging: Ideal for installations where the standard transducer cable is not long enough to reach the control head Durable Construction: Marine-grade cable built to withstand the elements for a reliable connection Excludes SOLIX/ONIX/APEX: This cable is not compatible with SOLIX, ONIX, APEX, or ION series products