this unit works vary well and you can purchase extra sd cards for the lakes you are going to go and fish at. Has vary good maps works vary well. The maps even show you the good fishing spots.

It a great a valuable piece of equipment. Im especilly impressed with the quality of the color screen and the fact I can see it in the worst conditions. I use it in the Gulf of Mexico and it provides me with accuate information in Depth, speed and also hits the mark with the fish finder. I turn it on as soon as I leave my marina the rivers here are very shallow and I can count on my Humminbird's depth sounder to keep me off the ground.

A great piece of electonic equipment for a very resonable price.

L. Green

Wesley Chapel FL