Airmar TM185C-HW High Frequency Wide Beam CHIRP Transom Mount 14-Pin Transducer f/Humminbird [TM185C-HW-14HB]TM185C HW High Frequency Wide Beam CHIRP Transom Mount 14 Pin Transducer for Humminbird Get more coverage under the boat with Airmar's wide beam Chirp. Offering a high frequency range of 150 250 kHz and a constant 25 Beamwidth, this transducer is truly broadband at its best. In addition to improving the performance of Chirp ready echosounders, anglers using this wide beam transducer will achieve twice the coverage under the boat compared to our