This transom mount transducer provides ultra-clear sonar pictures of objects, structure and fish that pass below your boat. This traditional CHIRP and CHIRP DownVü/SideVü transducer is optimized for depth performance and rough conditions. The CHIRP DownVü/SideVü elements have a power rating of 500 W per element (1,500 W total) and operating frequencies of 260/455 kHz. The traditional CHIRP sonar has a power rating of 600 W and operating frequencies of mid-band CHIRP 80-160 kHz. It also includes a built-in fast response temperature sensor. GT51M-TM includes a 12-pin transducer with mounting hardware and installation instructions. Follow the instructions carefully to avoid damaging your boat.