Humminbird XNT-9-HW-MSI-150-T MEGA SI/DI Dual Spectrum CHIRP Transducer w/Temp f/HELIX® 7/8 MEGA SIMeet the Humminbird XNT 9 HW MSI 150 T MEGA SI DI Dual Spectrum CHIRP Transducer with Temp, engineered for HELIX X series fishfinders to deliver ultra detailed imaging and reliable performance on the water. It combines MEGA Down Imaging with Dual Spectrum CHIRP in a single transducer and includes a built in temperature sensor for at a glance conditions. MEGA DI Frequency: MEGA Down Imaging operates at 10751150 kHz for ultra detailed structure. Dual