Ultrasonic Swallow Repeller provides a dynamic environment of changing conditions with its use of variables, such as frequency mode selections and speaker rotations at varying speeds.
Swallows are a rare exception in the bird world because they can be repelled using ultrasonics.
Very few bird species (owls being another) can hear into the ultrasonic range. The Ultrasonic Swallow Repeller is designed for indoor or undercover usage and can be used in close proximity to people without causing any disturbance.
The Ultrasonic Swallow Repeller effectiveness on swallows is consistently good. The device emits sounds specially designed to disorient, intimidate, and confuse unwanted birds out of the treated areas. When the pest birds hear these irritating soundwaves, they are forced to find calmer and more suitable areas.
Ultrasonic frequencies do not penetrate through solid walls or objects therefore make sure you place the unit where you can achieve maximum coverage. If you need to extend the coverage into a separate confined area, an extension speaker can take the output from one of the built-in speakers and transfer it instead to another location (limit 2 speakers).