I've a Humminbird 931C fishfinder for sale, it's an excellent unit with a 7" screen. It has a dual beam transducer for 20 degree and 60 degree bottom coverage. It does not have a built in GPS, but you link a GPS to it. Anyhow I'd like to move up to a new side imaging unit. Everything is there, manual, powercord, screen cover, and the mounting bracket which I modified to swivel using part of a Garmin bracket. If you go to Humminbird: America?s favorite Fishfinder ? the leading innovator of Side Imaging technology, then support, then manuals, you can see the manual online. $350.00