The Garmin 010-01964-00 is a transom mount transducer which provides ultra-clear sonar pictures of objects, structure and fish that pass below the boat. This transducer features CHIRP technology and CHIRP DownVü/SideVü for clear images at shallower depths. This 12-Pin transducer has a traditional CHIRP operating frequency of 50/200 kHz. It also includes a built-in fast response temperature sensor. .