with dual beam or dual frequency transducer ultra-bright 4″ diagonal qvga display 4000w max, 500w rms 320 x 240 pixels 800 nits of brightness streamlined-user interface offers easy selection of functions & features preloaded with worldwide satellite imagery & us inland lakes cartography over 5000 lakes & navigable rivers with detailed shoreline information as well as depth contours, boat ramps, mile markers, etc. lakes are enhanced with satellite imagery single secure digital card slot save waypoints, routes & tracks built-in gps antenna bnc connector for optional ga29 remote or gps antenna backlit keypad for easier operation at night 2 nmea 0183 1/0 ports canet proprietary bus allows display & control of full feature sounder data on chart plotters sounder design features shallow-water performance 3200w max dual frequency, 400w rms dual beam depth: 900 ft dual beam, 1500 ft dual frequency includes a dual-beam transducer 50 khz @ 45 & 200 khz @ 10 or 80 khz @ 45 & 200 khz @ 14 patented transom/trolling mount transducer ultrascroll high-rep rate sonar provides fast screen updates autogain technology enhances target visibility see-thru technology water temperature log graphically records water temperature data round flasher display mode (in dual-beam mode) & a-scope (in dual-frequency mode) whiteline adjustable depth line helps gauge desired fishing levels & bottom clearance split zoom display offers a closer look at fish targets & bottom structure 2x, 4x & bottomlock zoom adjustable keel offset alarms for fish size, shall water, deep water & low battery