Garmin echo Fishfinder Dual Beam Transducer. This Garmin Fishfinder Accessory is compatible with all echo Fishfinders by Garmin. The Dual Beam Transducer allows you to use your Garmin fish finder in more than one vessel. With a second fish finder transducer aboard using the Garmin echo can be made a lot easier. For more fishfinder accessories please visit our fish finder accessories page. Specifications for Garmin Dual Beam Transducer 01010249-20: Compatible with: echo 100/150/200/300c/500c/550c Features of Garmin Dual Beam Transducer for echo Fishfinders: Compatible with all echo series fishfinders Allows use of echo fishfinder on more than one vessel Comes with all hardware needed to mount on transom or trolling motor Package Contents: Garmin echo Fishfinder Dual Beam Transducer with Mount Depth Transducer Documentation Garmin echo Fishfinder Dual Beam Transducer 010-10249-20