The link to Garmin CV20-TM Traditional/ClearVu Transom-Mount Transducer has been copied
For the shallow water fisherman who wants traditional and CHIRP ClearVü scanning sonar, this transom-mount transducer consistently displays fish arches as well as clear pictures of objects, structures, and fish that pass below your boat. The transducer offers a 20' transducer cable and built-in, fast-response temperature sensor. Features a power rating of 500W, an operating frequency of 77/200 kHz (traditional) and 455/800 kHz (ClearVü), and a 0 to 70 transom angle. Transducer comes with transom and trolling motor mounts and installation instructions.