Garmin GT30-THGarmin GT30 TH Perfect for the shallow water fisherman who want CHIRP ClearV and CHIRP SideV scanning sonar with a stainless steel stem, this 12 pin thru hull transducer consistently displays clear definition of objects, structure and fish below and to each side of the boat. The transducer with built in fast response temperature sensor has a power rating of 500 W per element (1,500 W total); a depth of 750 ft (ClearV) and 500 ft left and right