Humminbird 587ci DI Sonar/GPS Combo - $399.88

4.5 high-definition 640V x 480H color display 2,400-watt peak-to-peak 300-watt RMS power Picture-like Down Imaging sonar imaging Conventional 2-D sonar format Internal GPS antenna Built-in UniMap SD-card slot for Lakemaster or Navionics charts Down Imaging: Sonar Coverage 455 kHz / 75 @ -10db 800 kHz / 45 @ -10db DualBeam Plus: Sonar Coverage 200 kHz / 25 @ -10db 455 kHz / 16 @ -10db Type: Sonar/GPS Combos. - $399.88

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