STRIKER™ Plus 4 With Dual-Beam TransducerPART NUMBER 010 01870 01 4 GPS Fishfinder with Industry leading Sonar and Quickdraw Contours Mapping Software Includes dual beam transducer with Garmin CHIRP traditional sonar for crystal clear images and remarkable target separation Built in Garmin Quickdraw Contours mapping software lets you create and store maps with 1 contours for up to 2 million acres Built in GPS lets you mark waypoints, create routes and view boats speed Bright, sunlight