Easily attach your compatible 4- or 8-pin scanning transducer to the trolling motor of your boat with this mount. Its low-profile design provides ultimate protection from underwater obstructions and easy mounting. Compatible Devices:All-in-one HD-ID and DownVu Transducer (4-pin)All-in-one HD-ID and DownVu Transducer (8-pin)echo 151dvecho 201dvecho 301dvecho 551dvechoMAP 50dvechoMAP 70dvGPSMAP 1020xsGPSMAP 1040xsGPSMAP 820xsGPSMAP 840xs