The STRIKER(TM) Plus 4 GPS Fish Finder gives anglers an easy way to navigate to the perfect fishing spot. This powerful tool features a transducer for CHIRP sonar that delivers detailed images. In addition, the built-in GPS allows you to mark waypoints, create routes and view you boat's speed, while Quickdraw Contours mapping software lets you create and store maps. The Garmin(R) STRIKER Plus 4 GPS Fish Finder has a bright, sunlight-readable display. FEATURES: Fish finder Includes transducer CHIRP sonar for detailed images Built-in GPS lets you mark waypoints, create routes and view boat's speed (unit does not have charts and cannot be upgraded with charts) Quickdraw Contours mapping software lets you create and store up to 2 million acres of maps with 1' contours Bright, sunlight-readable 4.3" display Intuitive user interface Rugged design Includes transom and trolling motor mounts