GooseBuster PRO protects areas up to 1 acre from both migratory & non-migratory Canada geese, ducks, & other waterfowl. The single-speaker version of our original GooseBuster® is here! This unique system was developed using decades of scientific research involving the behaviors & vocal communications of Canada geese. This system employs authentic goose alert & alarm calls recorded in the wild & are still the only such recordings in existence. Extremely effective in reducing & eliminating geese Audio makes areas uninhabitable for geese Geese learn not to return through behavior modification Customizable settings, completely humane Covers up to 1.5 acre per unit; pairing units covers 4-6 acres.