4" GPS Fishfinder with Industry-leading Sonar and Quickdraw Contours Mapping SoftwareIncludes dual-beam transducer with Garmin CHIRP traditional sonar for crystal-clear images and remarkable target separationBuilt-in Garmin Quickdraw Contours mapping software lets you create and store maps with 1' contours for up to 2 million acresBuilt-in GPS lets you mark waypoints, create routes and view boat's speedBright, sunlight-readable 4.3" display and intuitive user interfaceRugged design for every fishing environmentThe 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 Nobody knows the waters you fish better than you and your fellow fishermen. While you are trolling the shorelines and the depths, Quickdraw Contours mapping software creates HD fishing maps of the places you've been. No special knowledge is required. STRIKER Plus 4 can now store up to 2 million acres of your Quickdraw Contours maps with 1' contours. 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. GPS Fishfinder The built-in, high-sensitivity GPS finds and maintains your position anywhere you go on the water. The GPS allows you to mark waypoints for different locations. So, if the fish are biting in 1 spot, you can mark it, and return to it on your next trip. Mark docks, boat ramps and other locations on the lake, and create routes back to them for your next trip. GPS also allows STRIKER Plus 4 to show your speed on screen, so you can be sure you're trolling at the right speed for the lure youre using or in wake-controlled areas. Built for You The STRIKER Plus 4 fishfinder makes fishing a breeze, and it's built to work