BroadBand PRO targets pest birds with an unrelenting combination of four different sound types: 1) distress cries to indicate danger to pigeons, starlings, gulls and more, 2) predator cries, like falcons and hawks, to add realism, 3) general harassments for an all-bird defense, and 4) ultrasonic waves to guard day and night. Its development is based on forty years of success with sonic repellers that featured one of the four types, but this is the first machine to combine them all. This state-of-the-art technology eliminates the need to use multiple machines while providing sound variety. BroadBand PRO sound waves move from speaker to speaker for a constant, menacing defense. This powerful sound attack forces birds to leave for good, yet it's harmless to the birds and the environment. "Surround sound" directional speakers are separate from the control box to offer greatest all-around flexibility.