Lowrance MARK-4 HDI 83/200+455/800 Combo Plotter/Fishfinder with 83/200+455/800KHz Transom Mount Transducer (Discontinued by Manufacturer) 4.3" monochrome LCD 83/200KHz Broadband Sounder 455/800KHz Down Scan Imaging Built-in GPS Chart plotter Includes transom mount transducer