DownScan Imaging™ Elite-4 DSI Fishfinder/ChartplotterNew unique new fishfinding imaging precision GPS navigation and high-bright LED backlit 3.5"/8.9cm color display. The features you want at the price you need.New brighter LED backlightingExclusive TrackBack™ featureDownScan Imaging (DSI) reveals easy-to-understand photo-like underwater detailEasy-to-use menu page and menu controlsSimplified menu navigationQuick-release tilt and swivel bracketAccurate internal GPS antennaMicroSD card expandabilityLowrance 5 Year Advantage ServicePicture-Perfect FishfindingExclusive Lowrance DownScan Imaging™ displays crystal-clear photo-like views of the underwater worlds below the boat. No interpretation needed to see:Thermoclines Exposed - clearly see the boundary layer between the lower cooler water and upper warmer oxygen-rich zone where fish hangFish Truly Revealed - Elite-4 DSI imaging leaves nothing to the imagination clearly showing predator fish and baitfish schoolsBottoms Uncovered - you easily distinguish between hard and soft bottoms as well as fish and structure on/near the bottomStructure Disclosed - with photo-like views you can recognize all manner of structure at a glance like bridge pilings laydowns ledges drop-offs vegetation wrecks; no interpretation neededDual 455/800 kHz CoverageSelectable 455 kHz sounding for wider and deeper sonar imaging coverage with 800 kHz for enhanced viewing of targeted locations.More Power (and Depth and Speed) to YouElite-4 DSI fishfinders reach depths down to 200"/61M and show impressive bottom readings at boat speeds up to 40 mph. Advanced TransducerSlim new low-profile high-speed transom-mount 455/800 kHz Skimmer® DSI imaging transducer with exclusive down-looking crystal and built-in temp sensor and trolling motor-mount bracket option.Precision GPS Position AccuracyInternal accurate GPS for superior navigation guidance weven when mounted in-dash. Multiple Map/Chart OptionsWaterproof microSD media card slo