Garmin GT15M-THF 12 Degree 600W SS Thru-Hull TransducerThe Garmin GT15M THF 12 600W stainless steel thru hull transducer is designed for midsize fishing and cruising boats, delivering precise sonar from a flush mounted design that minimizes drag and optimizes beam orientation for clear returns. Transducer Power: 600 W Transducer Type: Thru hull, flush mounted stainless steel construction Transducer Frequency: Medium band CHIRP, 85165 kHz Beam Width: 2416 degrees Max Depth: 1,200 ft (saltwater); 1,900 ft