Humminbird EC M3 14W30 Extension (30ft) (720106-2)30 foot 14 pin extension cable, long run setups on larger boats. Humminbird EC M3 14W30 Extension (30ft) (720106 2) The Humminbird EC M3 14W30 is a 30 foot extension cable for 14 pin APEX XPLORE SOLIX transducers. For long cable runs on larger boats, center consoles, bay boats, or any setup with significant distance between transducer and display. Key Features 30 Foot Transducer Extension Cable 14 Pin M3 Format For Long Run Installations OEM