Be prepared out on your boat with the Humminbird Dual Spectrum CHIRP Transom Mount Transducer. This transom mount transducer supports Dual Spectrum CHIRP 2D Sonar with a high-frequency beam and a wide cone angle to offer a CHIRP range of 150-220 kHz and a max depth of 1,200 feet. Humminbird Dual Spectrum CHIRP Transom Mount Transducer - Mrne Electrncs And Radios at Academy Sports