Also an affordable unit, the Hummingbird Fish Finder 561 will provide you with the necessary package of oprions for tracking fish. Somewhat similar to the Hummingbird Fish Finder 718 unit, this unit also has a 5-inch diagonal display, with a 320V x 320H pixel resolution, in 12 level grayscale. Even if it's black and white, you will get pretty accurate returns and make a clear … [Read more...] about Hummingbird Fish Finder 561 Review