LOWRANCE HST-DFSBL Dual Frequency 50/200kHz Transom-Mount Skimmer Depth/Temp, Blue Conn. (FOR HDS TYPE UNITS) | 000-0106-77The LOWRANCE HST DFSBL is a dual frequency transom mount depth temperature sensor designed for HDS type units, delivering 50 200 kHz sonar with a blue connector for straightforward integration. Dual frequency sonar: 50 200 kHz operation for flexible sonar performance. Transom mount skimmer design: Mounts on the boat transom for stable readings. Depth and temperature sensing: Provides depth measurements and water temperature data. Blue connector: Blue