TheHumminbird XNT 9 20 T Single/DualBeam Transom Mount Transducer (Black #710198-1) is designed for seamless use with a wide range of Humminbird fish finders. This transducer is compatible with a variety of models, including all HELIX Series fish finders (excluding non-CHIRP DI models) and several legacy models from the Matrix, 100, 300, 500, 600, 700, 800, 900, and 1100 series.
eBay