Hummingbird XHS 9 HDSI 180 T Transom Mount Transducer 800 kHz Transom. This unit is combination DualBeam PLUS transducer that features 20- and 60-degree cone angles operating on 200 kHz and 83 kHx frequencies respectively as well as a side-imaging sonar with two 84-degree beams operating at 800 kHz. The XHS 9 HDSI 180 T includes a built-in temperature sensor a 20-foot cable and all the necessary high-speed hardware to get up and running right away. Although this unit has the same hole pattern as some older-version transducers it utilizes a design that is more secure and less prone to kick up at the high force of waves as well as having an improved running angle and an optional lock-down screw to override the kick up. Specifications for Humminbird XHS 9 HDSI 180 T Transom Mount Transducer: Mount Type: Transom Features of Humminbird XHS 9 HDSI 180 T Transom Mount Transducers: For use with: 1197c SI Combo 1198c SI Comb0 997c SI Combo 998c HD SI 998c SI 898c HD SI 898c SI 797c2 SI Combo (800kHz not active) 798c SI Combo (800kHz not active) 798ci HD SI Combo (800 kHz not active) Package Contents: Humminbird XHS 9 HDSI 180 T Transom Mount Transducer 800 kHz Transom 7102011 Humminbird 7102011: XHS 9 HDSI 180 T Transom Mount Transducer 800 kHz Transom