[New Generation Ultrasonic Technology] This ultrasonic insect repellent is the latest version, using an updated chip that is more powerful than before, making it harder for pests and rodents to resist. It has good effects on mosquitoes, mice, ants, cockroaches, flies, spiders, fleas, and more harmful insects. Easy to use Electronic insect repellent is a plug and play device, and the indicator light of the breathing light will light up when working. For better results, connect the mouse repellent to a location 10-30 inches above the ground, but you can determine the duration of installation based on the type of pest. Ecological Safety This product is non-toxic and environmentally friendly. Our insect repellent is 100% safe and effective. The ultrasonic frequency emitted by this machine is imperceptible to both humans and pets. Safe for children, families, and animals. However, if you have hamster pets at home, do not use this ultrasonic mosquito repellent. Wide scope of work Ultrasonic insect repellent can cover a maximum of 80-120 square meters (open area). Due to the inability of ultrasound to penetrate walls, it is recommended to use one device per room for better results. It is also an ideal choice for bedrooms, shopping centers, offices, garages, attics, basements, and warehouses. [Safe and Harmless] Ultrasonic insect repellent is 100% safe to the environment, does not pollute, is harmless to the human body, is safe for children, and does not affect the frequency of household pets. Meanwhile, it has no harmful chemicals or radiation, making it safe to use.