Garmin GT17M-THF SS Mid Band Chirp Transducer - 0° - 1kW - 8-PinGarmin GT17M THF SS Mid Band CHIRP Transducer 0, 1 kW, 8 Pin, a precision flush mounted sonar solution designed to slice through water with minimal drag while delivering crystal clear fish arches, structure, and bottom depth for fishing and cruising boats. Mid band CHIRP power 1 kW of output with CHIRP sonar (80165 kHz) for high resolution targets and superior separation of fish and structure. Deep reaching depth capability up to 1,800 ft in saltwater