XM 9 MDI T MEGA Down Imaging Transom Mount TransducerTransom-mounted Digital CHIRP Dual Spectrum 2D CHIRP with 25Adeg and 42Adeg coverage @ -10dB, 455/800/MEGA MEGA DI CHIRP with 45Adeg and 75Adeg @ -10dB Down Imaging transducer accessory. Features:Transom-mounted transducerOnly compatible with MEGA DI HELIX models1-Year Limited Warranty20 foot cable lengthWARNING: This product can expose you to chemicals including LEAD which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.