UNTESTED WITH MANUAL. The Humminbird Fishfinder 565 Head Unit is designed specifically for fishing enthusiasts, providing essential information for a successful fishing experience. With a high resolution of 640 vertical pixels and a wide viewing angle of 60 degrees, anglers can easily identify and locate fish in the water. This head unit is a crucial component for any fishing trip, offering reliable performance and accurate readings to help anglers make informed decisions about their catch.