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Garmin's GT51M-TH thru-hull transducer provides ultra-clear sonar pictures of objects, structures, and fish that pass below your boat. This traditional CHIRP sonar and CHIRP DownVü/SideVü transducer is optimized for depth performance and rough conditions. The CHIRP DownVü/SideVü elements have a power rating of 500W per element (1,500W total) and operating frequencies of 260/455 kHz. The traditional CHIRP sonar has a power rating of 600W and operating frequencies of mid-band CHIRP 80-160 kHz. Features a built-in fast-response temperature sensor. Specifically for hull deadrises less than 25°. GT51M-TH includes a 12-pin transducer with stainless steel stem, fairing block, isolation plate and bushings, mounting hardware, and installation instructions. Maximum depth of 1,800'.