Outstanding performance and incredible value come together in the Humminbird 581i. See everything on the 5" monochrome display 640 vertical pixels for a crystal clear view. With a screen that size, it's easy to take advantage of the versatile DualBeam Sonar with exclusive Humminbird SwitchFire technology, sensitive enought to track a jig down to 70 feet and seperate fish as close as 2.5" apart. You can also enable Humminbird's Fish ID+ target identification system to convert sonar returns into easy-to-read icons. Get all this technology in a convenient in-dash mount, or use our Tilt & Swivel Disconnect Mounting System. With the versatile, flexible the 581i, the toughest decision you'll make is when to call it a day. This unit also features a 50 channel GPS. This unit includes the head unit (screen), mounting base, internal GPS, transducer, power cord, necessary cables, and instruction manual.
Owner Reviews, Ratings, Comments and Criticism
I just finished installing the fish finder and took it out on the lake for the first time.
Installation was pretty easy. I had to read and follow the instructions but I had no problems. I will say I found it very hard to drill holes in a perfectly good boat.
On the lake, the GPS was great. The fish finder was very good also. It put me on fish, just not the right ones.
The only complaint I have is the fish alarm won't go off unless I show the fish icon. Maybe I just haven't figured that out yet.
Overall, it is everything I wanted and I am very satisfied.
