"FF525 Black Box Fishfinder FF525""Black Box Fish Finder Module""FeaturesImproved waterproof and shock resistant housing600W / 1000W Dual frequency Fish finder50 / 200kHz frequency selection2x and 4x Zoom, bottom lock and white line selectionsSensitivity Time Control (STC) and Surface Noise FilterCompatible with the following GPS Chartplotter models: CP155C, CP175C, CP1000C, CP180, CP180i, CP300, CP300i, CP500, CPV350, and CPV550" 
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