Humminbird 710211-1 XI 9 20 ICE Transducer. OVERVIEW: Get a deeper understanding of what's below the ice. The XI 9 20 features include Single/DualBeam Ice Transducer, 20/60 Degree, 200/83 kHz, and an 8-foot cable. COMPATIBLE with: 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 and 3D Models), All 1100 Series (EXCEPT DI Models), ICE 385ci Combo and All HELIX Series (EXCEPT DI Models). Does not work with the PMax or Fishin Buddy systems