XNT-9-HW-MSI-150-T MEGA SI/DI Dual Spectrum CHIRP Transducer with Temp f/HELIX 7/8 MEGA SI Transom Mount, MEGA Down Imaging, 455 kHz and 1.2 MHz and Dual Spectrum CHIRP 2D Sonar with a CHIRP range of 150-220kHz. Includes built-in temperature. Compatible with: HELIX 7 CHIRP MEGA SI GPS G3/G4, HELIX 7 CHIRP MEGA SI GPS G3N/G4N. Features:Compatible with: HELIX 7 CHIRP MSI GPS G3, HELIX 7 CHIRP MSI GPS G3N, HELIX 7 CHIRP MSI GPS G4, HELIX 7 CHIRP MSI GPS G4NCable Length: 20 FeetDual Spectrum CHIRP Frequencies: Full: 150-220 kHz, Narrow: 180-240 kHz, Wide: 140-200 kHzDual Spectrum CHIRP Max Depth: 1200ft 365mSide Imaging Frequencies – Max Range side-to-side: 455kHz: 440-500 kHz – 800ft 146m, MEGA SI: 1075-1150 kHz – 250ft 76mDown Imaging Frequencies – Max Depth: 455kHz: 440-500 kHz – 125ft 38m, MEGA DI: 1075-1150 kHz – 75ft 23m