Humminbird 71019801 XNT 9 20 T Transom Mount Transducer. Overview: Single/DualBeam, 20/60 Degree, 200/83 kHz, with built-in temperature. More secure, especially at high force of waves. Improved running angle and optional lock down screw to override the kick up. Cable length: 20 feet. Compatible with: All Matrix (EXCEPT Matrix 47 3D), All PiranhaMAX (EXCEPT 180, 165, 175, 176i, 195c, 196ci, 197c, 197c DI, PiranhaMAX 4, PiranhaMAX 4 DI), All 100 and 300 Series (EXCEPT DI models), All 500 Series (EXCEPT DI models), All 600 Series (EXCEPT DI models), All 700 Series (EXCEPT DI models), All 800 Series (EXCEPT DI models), All 900 Series (EXCEPT DI models and 3D models), All 1100 Series (EXCEPT DI models) and All HELIX Series (EXCEPT DI models)