Transom mount GT20-TM DownVü 455/800kHz Trad. 77/200kHz DV/Trad. 455/800kHz 77/200kHz 500W 550W. Crystal-clear sonar images of objects, structures, and fish beneath the boat - this 4-pin transducer makes it possible. The 20-foot transducer cable with an integrated, fast-responding temperature sensor is impressive. It offers a power rating of 500 W, a depth capability of 1,900 feet (traditional) or 750 feet (DownVü), an operating frequency of 77/200 kHz (traditional) or 455/800 kHz (DownVü), and a transom angle range of 0 to 70 degrees. The transducer package includes mounting brackets for installation on the transom and the electric boat motor, as well as installation instructions. Be sure to follow the instructions to avoid damage to the boat. Compatible devices: echo 151dv, echo 201dv, echo 301dv, echo 551dv, echoMAP 42dv, echoMAP 52dv, echoMAP 72sv, echoMAP 92sv.