GARMIN 010-10249-20 DUAL BEAM TRANSOM MOUNT TRANSDUCER 4 PIN

Want to use your echo™ series fishfinder in more than one vessel – A second transducer can make the process a lot easier. It comes with all of the hardware you need to mount on your transom or trolling motor.

Please Note: echo 100 is a single-beam fishfinder. When using this transducer with echo 100, it will only transmit and receive at the 200 kHz frequency