The FCV585 is a dual frequency (50 kHz and 200 kHz) Color LCDSounder featuring Furuno''s DSP technology. The FCV585 displaysunderwater conditions in 8, 16 or 64 colors on a super-bright 8.4"LCD screen. Youve probably heard about digital fish finders, butarent quite sure what the difference is. The main difference is thefiltering capabilities and auto adjustments. Our new DSP (DigitalSignal Processing) technology helps adjust gain, STC Clutter andoutput power, as well as suppress main bang (the echoes just belowthe transducer.) It also makes the picture clearer and easier todecipher. But even the best digital filter wont help unless youstart with a solid basis, such as Furunos renowned fish findertechnology. The FCV585''s waterproof construction allows it to beinstalled on any bridge. Audio and visual alarms alert you wheneverpreset limits are met for water depth, water temperature and fishechoes. Selectable display modes include High or Low Frequency,Dual Frequency, Zoom, Nav Data, A-Scope, Marker Zoom, Bottom Zoomor Bottom-Lock. Furuno''s TLL (Target Lat/Lon) output allows you tointerface the FCV585 with your Furuno chart plotter so you can markany spot you desire and save it as a waypoint, enabling you toreturn to it whenever you desire. Standard Features: Dual-Frequency50/200 kHz New DSP Filter makes the picture clearer and easier todiscriminate between baitfish and larger target species 8/16/64Color Echo Presentations Hands free adjustments of gain, STC &output power through digital filtering 8 Range Scales to 2,500 feetHigh output power of 600W or 1kW Audio and visual alarms for waterdepth, fish echoes and water temperature* Wide variety oftransducer options Bright, 8.4" color LCD gives excellentreadability even in broad daylight