4" diagonal screen. Film SuperTwist LCD High-definition 168 vertical pixel resolution.  Backlit screen. 4-level grayscale 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 60? with high sensitivity settings - Operates at boat speeds up to 70 mph (61 kts).  Advanced Signal Processing (ASP?) automatically adjusts your settings for the best sonar picture.  Patented GRAYLINE? separates fish from nearby structure and bottom.  Advanced Fish I.D.?? shows underwater targets in different sizes of fish symbols. FishTrack? 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. Ultra compact case design with an adjustable tilt, quick-release mounting system. Easy to connect/disconnect with uniplug cable connector. Internal back-up memory for key sonar settings. Completely sealed and waterproof, even for use in harsh saltwater environments. Full one-year warranty.