The Humminbird 997c SI delivers high definition breakthrough Side Imaging sonar for picture-like images of the bottom, precision GPS Chartplotting, and a no-compromise ultra wide, high resolution 8" screen. Features Networkable, High Definition Side Imaging Fishing System New High Definition 800kHz Side Imaging provides even better image clarity Brilliant, 8" sunlight viewable color display with 480V x 800H resolution Revolutionary 800kHz Side Imaging sonar technology with 180° of coverage and dual frequency 83/200kHz sonar in one transducer 16 channel WAAS/EGNOS GPS receiver included Built-in UniMap™ of the USA coastline, inland lakes and rivers to 30 meters per pixel resolution Compatible with Navionics Platinum Charts featuring photo overlays, 3D viewing, and port approach aeriel photos Tidal graphs and port services information available with optional Navionics Gold Charts 4000 Watts PTP, 500 Watt RMS Standard; 8000 Watts PTP, 1000 Watt RMS Maximum Power Output* Two memory card expansion slots to save Screen Snap Shots and view optional cartography Dual microprocessors, graphics co-processor and triple channel sonar transmitter/receiver deliver fast, smooth operation Sonar/chart recording to SD card and on-screen playback Full screen chartplotter, 3D bird's eye view chartplotter and split screen sonar/chart with adjustable split Programmable view presets access important screens with one touch Plug & Play compatibility with InterLink Network Connection, CannonLink Downrigger Control, WeatherSense Barometric Pressure, and Wireless Sonar Link Fishing System Modules In-dash or Gimbal mount. Expandable & upgradeable Fishing System *Maximum power output requires the use of 1kW transducer Additional Features Fresh and saltwater set up options for optimal performance in any environment Accelerated Real Time Sonar™ operates at up to 40 times per second to instantly capture the action under the boat X-press™ menus place most important setting at your fingertips Freeze Frame pauses the sonar scroll for detailed inspection of the screen Instant Image Update immediately shows the results of setting changes for the most accurate fine tuning Sonar Echo Enhancement™ technology is so sensitive it'll track a jig to over 70ft and separate targets within 2 ½ inches Man Overboard Function quickly adjust the boat track back to a specific spot with the touch of a button Fully gasketed waterproof design and it floats Selectable large digit screen for easy-to-read number display Backlight for night viewing TripLog with distance, elapsed time, and average speed Totally automatic operation or totally manual operation with upper and lower range control Temperature graph overlay and audible temperature alarm along with One-touch Zoom with 2x, 4x, 6x, and 8x zoom levels Adjustable chart speed and feature memory retains your settings Water surface temperature included in transducer, speed paddlewheel included PC Connection capability to save waypoints, and upgrade internal software Optional 200/50kHz transducer available for deep water applications and depths to 3000 feet One-year limited warranty Assembled in U.S.A.