Garmin 4-Pin 10' Transducer Extension Cable f/echo™ SeriesGarmin 4 Pin 10' Transducer Extension Cable f echo Series Transducer Extension CableUse this 10' (3M) extension cable to connect your 4 pin transducer to your sonar unit. Compatible Devices: echo 100 echo 150 echo 200 echo 300c echo 500c echo 550c WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. Features Type = Extension