From With

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best ultrasonic pest repeller
The ultrasonic sound frequency of the
best ultrasonic pest repeller at a frequency of 22kHz-33kHz,日本大人気ぢ一番新入荷づ通販 the mouse can hear these sound and feel uneasy and they will escape from the house. These sound have no harm for human.The effective range can reach 1076 sq.ft. Good effect to repel the mouse in your house. You can put it in any room in your house. The ultrasonic speakers builted in the equipment. No chemicals, poisons or traps, safe for you and your family.