Garmin Bronze Thru-Hull Mount Transducer w/Depth & Temperature B265LM 010-11647-20. This transducer has a depth of 3000 ft; an operating frequency of 42 to 65 kHz and 85 to 135 kHz; a beamwidth of 16 to 25 degrees and 11 to 16 degrees; and a 0 to 20...