The STRIKER Plus 4 fishfinder with a bright 4.3” display and built-in GPS features CHIRP sonar for crystal-clear images and Quickdraw Contours map drawing software, which stores up to 2 million acres of content with 1’ contours. The built-in GPS lets you mark and navigate to waypoints and shows your boat’s speed. Garmin Quickdraw Contours: While you are trolling the shorelines and the depths, Quickdraw Contours mapping software creates HD fishing maps of the places you’ve been. CHIRP Sonar Clarity: The STRIKER Plus 4 fishfinder includes Garmin CHIRP technology for a higher level of clarity and detail that you have come to expect from Garmin. Crystal-clear sonar images provide remarkable target separation and resolution in shallow and deeper water. Bottom contours are more visible, even at higher speeds, and signal noise can be suppressed at greater depths for a timely interpretation of what’s below.