This electronic mice repellent emit high frequency sound waves to create an acoustically hostile environment that effectively repels rodents from protected areas. Sound is inaudible to people and non-rodent pets. It is ideal for environments were the use of poisons is inadvisable or prohibited.
It is known that a mice can hear ultrasonic sound frequencies between 30 KHz and 50 Khz and this electronic repellent circuit is pretty loud for his ears and it will chase him away (hopefully). Beware mice, rat or mouse!