Sonic rodent repeller. No poisons, no traps, no dead rodents to clean up. Eco-friendly—FCC compliant & manufactured in an epa registered facility. Produces ultrasonic waves in a swept frequency, constantly changing 60 to 80 times a second between 32khz & 62khz. Used in homes and apartments, food service outlets, business, farm buildings, kennels and stables. Drives away mice, rats and other pests. Used in homes and apartments, food service outlets, business, farm buildings, kennels and stables.