Garmin Airmar R109LHW 2kW 38-75kHz 150-250kHz Thru-Hull Transducer [010-12182-20]Airmar R109LHW 2kW 38 75kHz & 150 250kHz Thru Hull Transducer This plastic thru hull mount transducer uses the low frequencies for deep water performance and high wide frequencies for shallow water performance. A 2 kW in a slightly smaller package, this bare wire transducer has a depth of 8,000 feet; an operating frequency of 38 to 75 kHz and 150 to 250 kHz; a beamwidth of 9x23 degrees or a constant 25 degrees; and a 0 to 25 degree deadrise.