The unit uses a complex "swept" sound frequency with multiple "peaks". The intensity, complexity and changing frequencies prevent rodents from getting used to the sound emitted. ... This ultrasonic rodent repellent will only affect rodents, rats, mouse, mice, hamsters, guinea pigs and squirrels.
Rodent repellent system is an intelligent system which helps in keeping the rodent away from the protected area with high frequency ultrasonic sounds. The powerful sound waves generated by the transducers of repellers are within the hearing range of many pests and cause them pain and discomfort
How does the rodent repellent system works?
Ultrasonic Rodent Repellent are electronic transmitters of high frequency sound (well above the 20 KHz frequency which is the upper limit of the hearing range of the human ear). They emit intensive sound at high decibel levels (sound pressure) that is audible and painful to rats (rodents) but is inaudible and harmless to humans