I will say this, I installed one in Nov, firt tournamnet, i crank it up on first pass throwing square bills, i kid u not the shad start popping up, one here, one there, about 15 yards in front of the boat. Its no fluke, I do think it "calls" them up some. Also drop shotting in 30 ft i can turn it on and move schools up of the bottom. Its an interesting tool either way