The Furuno 165T-B54 is a multi-beam transducer for the DFF3D sonar that provides a 120° port-starboard view of the underwater world. Its compact design allows for easy installation. A built-in motion sensor stabilizes the display to give clear and stable images, even under rough sea conditions. 165 kHz operating frequency. Durable bronze construction resists corrosion Built-in motion sensor stabilizes the display | Furuno 165T-B54 Bronze Thru-Hull Transducer