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Garmin Airmar CM599LHW 1-3kW Pocket Mounted Transducer, 28-60 150-250kHzAirmar CM599LHW 1-3kW Pocket Mounted Transducer, 28-60 & 150-250kHzThis pocket mounted transducer uses very narrow beams and low frequencies and wide beams for high frequencies to send depth and t... Learn More