15000hz, 17500hz & 20000hz Ultrasonic Ultimate Extreme Mouse And Rat Repellent (11 1/2 Hours) Access

The volume needs to be high enough to fill the room, but be mindful of pets. Dogs and cats can hear these frequencies and may become stressed.

Sound waves at these frequencies do not travel through walls or furniture. For the best results, place the speakers in the open, directed toward the area where activity is highest. The volume needs to be high enough to

This is at the edge of human hearing (often audible to children and young adults as a high-pitched whine) but is piercingly loud to rodents. place the speakers in the open

Mice and rats have a much broader hearing range than humans, extending well into the ultrasonic spectrum (up to 70–90 kHz). The volume needs to be high enough to