Garmin GT20-TM four-pin transom transducer with 77/200 kHz sonar and 455/800 kHz ClearVü. Availability and terms on request.

The four-pin Garmin GT20-TM is a transom-mount transducer with 77/200 kHz traditional sonar and 455/800 kHz ClearVü. It provides sonar returns and structure views below the vessel.

Is this transducer compatible with my sounder?

Check the sonar model, connection, desired functions and mounting location. Matching pin counts alone do not confirm every integration capability. Share your installation to review adapters where applicable, cable routing and positioning with Wonder BOAT.