Big performance and features, compact case. Featuring the new 83/200 kHz Dual-Search technology for optimum fishfinding performance in both shallow and deep waters! Display: 4" (10.2 cm) diagonal screen Film SuperTwist LCD 240x160 pixel resolution Backlit screen 4-level grayscale Sonar: Depth capability to 800 ft* (244 m) with 1,500 watts of peak-to-peak power Compact 83/200 Dual-Search Skimmer transducer with dual beams producing up to 120 degrees of fishfinding coverage - includes built-in temp sensor 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 Optional Portable Version: Optional pack includes Port-Power Pack case and portable compact Dual-Search Skimmer transducer with suction-cup mounting bracket (batteries not included) Performance: 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 * 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.