(Children and Pet Friendly) - 100% safe for human and pets. No poisons, no chemicals, non-toxic. The ultrasonic technology can drive pests away without killing them. Eco-friendly and save your effort to clean up the dead insects. It is cheaper and more durable than those expensive pest control companies and other pest control methods. (Newest Ultrasonic Technology) - Adopting the latest dual-chip ultrasonic technology, the pest repellent emits different frequencies of ultrasonic wave to irritate nervous system of insects and rats to efficiently drive pests away. Intermittent changes in ultrasound frequency prevents them from developing immunity and adaptability.