The CUDA 250 S/Map now makes finding fish and finding your way so simple, and at simply the lowest price found anywhere! In addition to packing a full list of fishfinding features into this compact case, this CUDA also squeezes in an internal GPS+WAAS antenna and high-detail mapping! Display: 4" (10.2 cm) diagonal screen Film SuperTwist LCD 240Vx160H resolution Backlit screen 16-level grayscale Overlay Data feature displays GPS data on sonar screens and sonar data on GPS screens Sonar: Depth capability to 600 ft* (183 m) with 800 watts of peak-to-peak power High-performance, low-profile 200 kHz Skimmer transducer with built-in temp delivers a wider, more effective fish detection area of up to 60o with high sensitivity settings - Operates at boat speeds up to 70 mph (61 kts) FishRevealTM feature exposes fish targets hidden in surface clutter, weed beds, thermoclines, and other types of underwater cover HyperScrollTM feature locates and displays fish targets at higher boat speeds Advanced Signal Processing (ASPTM) automatically adjusts your settings for the best sonar picture Patented GRAYLINE separates fish from nearby structure and bottom Advanced Fish I.D.TM shows underwater targets in different sizes of fish symbols FishTrackTM displays target depth readings above fish symbols Surface water temperature readings come from a built-in temp sensor in the transducer Zoom with zoom bottom tracking and easy zoom-in/out control GPS+WAAS: Full 12-parallel channel GPS and WAAS receiver with advanced internal satellite antenna Built-in high-detail mapping of lakes, rivers, Great Lakes, and U.S. coastal waters with enhanced shoreline detail and nav aids Full-screen map, map with digital data, steer-to navigation screen, and GPS satellite status display choices Saves up to 1,000 waypoints, 1,000 event markers, and 100 routes (up to 100 waypoints/route) 100 savable plot trails with up to 10,000 points per trail 42 graphic icons to mark your favorite spots 40 zoom ranges - from 0.02 to 4,000 miles - with easy zoom-in/out control Off course, arrival, and anchor GPS alarms Performance: Internal back-up memory keeps stored GPS data and sonar settings safe and accessible for years Completely sealed and waterproof for use in the harshest environments Full one-year warranty * Actual depth capabilities depend on transducer configuration and installation, bottom composition and water conditions. All sonar units typically read deeper in fresh water than salt water.