Combine an expert GPS and sonar with in-depth plug-and-play navigation and you get the Lowrance Elite-4 DSI with Lake Insight Pro. The Elite-4 DSI features 320x240 3.5" LED-backlit color display, 2,800-watts peak-to-peak/350 RMS power, 455/800kHz DualBeam DownScan transducer, 200-ft. maximum depth, easy-to-use menu controls, quick-release tilt and swivel bracket, internal precision GPS antenna, micro-SD-card slot for high-detail mapping options and a unique TrackBack™ tool for sonar scroll-back review of covered water. The Insight Pro chart card comes fully loaded with detailed guidance for inland, coastal and offshore waters, expert fishing tips, marked fishing locations and fishery profiles. Compatible with the HDS units Elite™-4, Elite-5, Elite-7 and the Mark™-4. Includes high-resolution shorelines, depth contours, navigation aids and more. The chart card offers ample memory space to record sonar logs, screen shots and routes without an additional SD memory card. Not only do you have a technologically enhanced guide, you have a sixth sense for what's waiting for you in those waters.