Humminbird XNT-9-HW-SI-T - Transom Mount Side Image Transducer [710306-1]XNT 9 HW SI T Transom Mount Side Image Transducer This transom mount transducer provides CHIRP Side Imaging, CHIRP Down Imaging, Dual Spectrum CHIRP, and temperature for compatible HELIX fish finders. Includes a 20 foot cable and mounting hardware. Features: Dual Spectrum CHIRP 2D Sonar with a CHIRP range of 150 220kHz Side Imaging frequencies of 455 kHz with built in temperature This transducer does not support MEGA Side Imaging or MEGA Down Imaging