Airmar TM275C-LHW 1kW Chirp Transom Mount Transducer [TM275C-LHW-MM]TM275C LHW 1kW Chirp Transom Mount Transducer Get more coverage under your boat with Airmars unique wide beam, high frequency Chirp ready transducers. The high band operates across a frequency range of 150 to 250 kHz and has a fixed 25 beam for all frequencies. The high frequency band results in superior resolution. The constant wide beamwidth provides twice the coverage under the boat and excellent fish arches on the display compared to most high