The pair of Garmin GT50M-THP thru-hull transducers are perfect for the coastal and offshore fisherman who wants traditional sonar, CHIRP ClearVu and CHIRP SideVu scanning sonar with stainless steel stems. Once connected to your compatible Garmin Chartplotter or Fishfinder the pair of 12-pin thru-hull mounted transducers consistently displays fish arches as well as clear pictures of objects, structure and fish that pass below and to each side of your boat. The CHIRP ClearVu/SideVu elements have a power rating of 500W per element (1,500W total) and operating frequencies of 455/800 kHz. The traditional CHIRP sonar has a power rating of 300W and operating frequencies of mid-band CHIRP 80-160 kHz. It includes a built-in fast-response temperature sensor. For hull deadrises less than 25 degrees. Garmin GT50M-THP transducer includes a 12-pin port/starboard transducers with stainless steel stems, fairing blocks, Y-cable, bushings, mounting hardware and installation instructions.