Garmin GT12M-THF Transducer - Less time finding. More time fishing. Designed for reduced drag and optimum sonar performance on midsize fishing and cruising boats, this flush-mounted, 350-watt midband CHIRP transducer clearly defines fish arches, structure and bottom depth returns on your display. See maximum depth performance to 1,200' in freshwater. Access CHIRP sonar frequency range from 85-165 kHz. Search with beamwidths of 16-24 degrees. Count on fast-response water temperature sensing. Thru-hull design offers flush installation with 0-, 12- or 20-degree tilt. Auto-ID enables simple plug-and-play operation.