Programmable species-specific sonic bird repeller The 4-speaker SUPER Bird X Peller Pro uses birds own distress calls to create a “danger zone” – it scares bird pests away for good and covers up to 6 acres (2.4 hectares)! Predator cries help scare all the birds. Actual Distress Cries Choose any or all of 8 sounds including predators to give the birds even more of a sense of danger. Then customize by choosing volume silent time between sounds and hours of operation.