HighlightsDesigned with 4 ultrasonic speackers, the rodent chaser can emit ultrasonic sound at frequency of 22-36KHz or 25KHz, which can effectively chase away rats, mice, squirrels & other small rodents and restrain roachesThe 3 PIR sensors helps our ultrasonic mice repeller detect rodents and provide 360º protection up to 1291sq.ft coverage area.The ultrasonic sound of this ultrasonic mice repeller is specially designed above the rodent hearing, safe for humans, children, mothers, babies, cats