Humminbird XM 9 MDI T MEGA Down Imaging Transom Mount Transducer [710269-1]XM 9 MDI T MEGA Down Imaging Transom Mount Transducer Transom mounted Digital CHIRP Dual Spectrum 2D CHIRP with 25 and 42 coverage @ 10dB, 455 800 MEGA MEGA DI CHIRP with 45 and 75 @ 10dB Down Imaging transducer accessory. Features: Transom mounted transducer Only compatible with MEGA DI HELIX models 1 Year Limited Warranty 20 foot cable length WARNING: This product can expose you to chemicals including LEAD which is known to the State of California