Lowrance Dual Frequency Transom Mount Transducer Hst-dfsbl depth transducer with TEMP, mfg.# 000-0106-77, 50/200kHz, 35/12 degree beam angles, with temperature sensor Transom mount "skimmer" Includes 25' cable with blue connector Transom-mount dual-frequency transducer for select fishfinders Helps find fish, measure depth, and determine water temperature 50/200 kHz frequency; built-in temperature sensor Comes with 25-foot power cable