Humminbird MEGA DI Dual Spectrum CHIRP Transom Mount Transducer w/Temp f/HELIX 7/8 XNT-9-HW-MDI-75-T. Includes built-in temperature sensor rugged composite design impact-release mounting bracket and 20 cable. Specifications for Humminbird XNT-9-HW-MDI-75-T MEGA DI Dual Spectrum CHIRP Transom Mount Transducer w/Temp f/HELIX 7/8: Manufacturer: Humminbird Color: Black Frequency Band: 200 kHz Cable Length: 20 ft Features of Humminbird XNT-9-HW-MDI-75-T MEGA DI Dual Spectrum CHIRP Transom Mount Transducer w/Temp f/HELIX 7/8 This accessory is compatible with the following Humminbird products: HELIX 7 CHIRP MEGA DI GPS G3 HELIX 7 CHIRP MEGA DI GPS G3N HELIX 8 CHIRP MEGA DI GPS G3N. Dual Spectrum CHIRP Frequencies: Full: 150-220 kHz Narrow: 180-240 kHz Wide: 140-200 kHz Dual Spectrum CHIRP Max Depth: 1200ft (365m) MEGA Down Imaging Frequencies - Max Depth: 455kHz: 440-500 kHz - 350ft (107m) MEGA DI: 1075-1150 kHz - 125ft (38m) Package Contents: Humminbird XNT-9-HW-MDI-75-T MEGA DI Dual Spectrum CHIRP Transom Mount Transducer w/Temp f/HELIX 7/8 Humminbird 710295-1: MEGA DI Dual Spectrum CHIRP Transom Mount Transducer w/Temp f/HELIX 7/8 XNT-9-HW-MDI-75-T