High fidelity recorded samples of distress cries creates a seemingly hazardous environment that birds avoid. When birds encounter dangerous situations or spot a predator, they let out very specific distress and alarm calls to notify other birds that the area is not safe. The BirdXPeller Pro rebroadcasts naturally recorded versions of these sounds to create an environment that is not only unfriendly for pest birds, but gives the impression that it would be life-threatening for the birds to occupy the area. Because of this, birds will not linger for long when the BirdXPeller is operating. Possible Usage: Outdoor areas, front or back yards, private homes, parks, open canopies, awnings, eves, sheds, rooftops, parking lots, fields, car lots, buildings, warehouses, docks, much more• Effective method for keeping birds and other pests from infesting large open areas. • Birds perceive danger and flee when they hear these sounds. • Installs Easily: Mount it nearly anywhere. • Variable Frequencies: Attacks different birds with different settings. • When installed properly, no ongoing maintenance is required. • No Moving Parts: No mechanical repairs needed. • Comes complete with 110 AC adapter with 50" cord.Repels: Pigeons, Crows, Sparrows, Starling, Seagulls, Grackles, Cormorants, Vultures, Rodents and more.