Garmin Striker 4cv w/ Transducer,4" GPS Fishfinder w/ CHIRP TraditionalProduct Description The STRIKER Plus 4cv fishfinder with a bright 4. 3 display and built in GPS features Garmin CHIRP traditional sonar, Garmin CHIRP ClearV scanning sonar 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 boats speed. Includes transducer for built in Garmin CHIRP traditional sonar plus CHIRP ClearV scanning