About this itemFUN FOR KIDS AND PETS: The ultrasonic insecticide is absolutely safe for children and pets. Its sound frequencies are only harmful to pests such as mice. Highly intelligent technology: This rodent repellent uses the latest technology to emit ultrasonic waves of different frequencies that stimulate the nervous system of insects and rodents. They then feel uncomfortable and gradually run away. Intermittent changes in ultrasonic frequencies prevent them from developing their immunity and adaptability. Simple Design: The ultrasonic pest detector is portable and easy to install. Just turn it on and it's ready to go. Widely used in homes, warehouses, offices, gardens, hotels, etc. Larger Coverage: The effective coverage of one pest control can be up to 30 square meters. It is recommended to install this pest control device vertically, at a height of 32 to 47 inches above the ground.