Now you can make your older Gen1, Gen2, and Gen2 Touch sonar's "Chirp" by adding a Lowrance sonar module to your system. The module will even allow your standard 50/200 transducer to chirp. Chirp provides a much more crisp and clear sonar image on your Lowrance unit. I thought the images I've been seeing on my Touch Gen 2's were great until a friend sent me these images off of John Keizer's Saltpatrol.com boat. The fish arches on these images are a lot more defined using Chirp technology.
Here's a link for more details about the sonar module, also called the Sonar Hub. Good stuff
http://www.lowrance.com/en-US/Products/ ... en-us.aspx