Garmin Accessory Xdcr Adapter 8pin Sounder to 4pin Transducer. Combatable with Garmin 4-pin transducers and 8-pin sounders only. Includes a twist lock end for a secure connection. Specifications for Garmin Xdcr Adapter 8pin Sounder to 4pin Transducer: Manufacturer: Garmin Additional Features: 4 to 8 pin Color: Black Features of Garmin Xdcr Adapter 8pin Sounder to 4pin Transducer Adapter cable for select Garmin ECHOMAP products Adapts a 4-pin transducer to an 8-pin sonar port Includes a twist lock end for a secure connection Color: Black Package Contents: Garmin Xdcr Adapter 8pin Sounder to 4pin Transducer Garmin 010-12721-00: Accessory Xdcr Adapter 8pin Sounder to 4pin Transducer