With this ultrasonic generator, siren-like pulsing, aggressive ultrasonic tones are produced, which are perceived as extremely unpleasant by many animals. For this reason, rodents, insects, crawling parasites, wildlife, birds, etc., avoid the area secured by the ultrasonic generator. For optimal effect, the generator features an adjustable frequency range of 8 to 40 kHz, with a specialized speaker equipped with a curved aluminum dome membrane ensuring optimal sound distribution.