Garmin GT17M-THF SS Mid Band Chirp Transducer - 20 - 1kW - 8-Pin [010-02930-02]GT17M THF SS Mid Band Chirp Transducer 20 1kW 8 Pin Designed for reduced drag and optimum sonar performance on fishing and cruising boats, this flush mounted 1 kW mid band CHIRP (80165 kHz) transducer clearly defines fish arches, structure, and bottom depth returns on the display. Features: See maximum depth performance to 2,400 in freshwater Access CHIRP sonar frequency range from 80165 kHz Search with beamwidths of 918 degrees Count on fast response