Garmin 010-10249-20 Transom/Trolling Motor Mount Dual Beam Transducer
This dual beam transducer replaces the one included with your echo series fishfinder. A 500 W 4-pin transducer; an operating frequency of 77 to 200 kHz; a beam width of 45 to 15 degrees; and mounts on a 0 to 70 degree transom.