Garmin Airmar R111LH 2kW In-Hull Transducer, CHIRP Low (38-75kHz) CHIRP High (130-210kHz) [010-11643-20]Airmar R111LH 2kW In Hull Transducer, CHIRP Low (38 75kHz) & CHIRP High (130 210kHz) This in hull transducer uses narrow beams at low high frequencies to display depth and temperature data to your Garmin Marine Network via your sonar, such as the GSD 26. Designed to allow both traditional and Spread Spectrum scanning, this 2kW barewire, plastic transducer has a maximum depth of 8,000 ft; an operating frequency of 38 to 75 kHz and 130 to 210 kHz; and a