Furuno Multibeam Transducer f/DDF3D Thru-Hull. 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. Specifications for Furuno Thru-Hull Multibeam Transducer f/DDF3D: Manufacturer: Furuno Color: Black Hull Type: Thru-Hull Package Contents: Furuno Thru-Hull Multibeam Transducer f/DDF3D Furuno 165T-B54: Multibeam Transducer f/DDF3D Thru-Hull