Humminbird - XNT 9 SI 180 T - Transom Mount Side Imaging Down Imaging Transducer - 710200-1Humminbird XNT 9 SI 180 T Transom Mount Side Imaging Down Imaging Transducer 710200 1 New transom mount transducer design. Compact dual side imaging. 20 74 84 degree, 200 83 455 kHz with built in temperature. New design is more secure and is not a prone to kick up at high force of waves. It has an improved running angle and a optional lock down screw to override the kick up. Has same hole pattern as some older version transducers. For Use With: 797c