THIS IS A TAKE OFF HUMMINBIRD TRANSOM MOUNT TRANSDUCER. HUMMINBIRD MODEL # XNT 9 20 T. HUMMINBIRD PART # 710198-1. Compatible with: All HELIX Series except non-CHIRP DI models, Matrix 10, 12, 15, 17, 20, 27, 67, 77, 87, 97, All 100 and 300 Series except DI, All 500 Series except DI, All 600 Series except DI, All 700 Series except DI, All 800 Series except DI, All 900 Series except DI, 3D models, All 1100 Series except DI, and HDR650 to the maximum capability of the transducer.
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