The Humminbird Transom Mount Transducer is a Single/Dual Beam, 20/60 Degree, 200/83 kHz transom mount transducer that features built in temperature and a 20 ft. cable. The XNT9-20-T is more secure, especially at high force of waves and features an improved running angle and an optional lock down screw to override the kick up. Transducer only, mount and fish finders sold separately.