Upgraded Technology: Insect repellent uses powerful chip technology to prevent pests and rodents from escaping. It can effectively eliminate all kinds of insects, rodents, mice, spiders, fleas and other pests, while maintaining quiet operation, not making too much noise and ensuring sleep quality. Large area Coverage: Using two ultrasonic insect repellents at the same time, an effective area of 100-150 square meters can prevent mosquitoes from infesting. Pest control is widely used in all large facilities and places Easy to use: simply plug insect repellent into the socket and let it flow. Insect repellent can repel pests immediately without killing them. Low energy consumption and high efficiency to repel mosquitoes, no pollution This device can be directly plugged into the AC 220V (or 110V) socket (power range: AC 90V-250V frequency: 50Hz - 60Hz). This ultrasound device must be installed 80-120 centimeters from the ground. And vertical to the ground and plug into the power outlet. This type ultrasonic repellent friendly to humans Harmless and non-toxic to human body: this repellent is safe for humans and our lovely pets like dogs and cats. Repels mosquitoes and poisonous insects with specific frequency, will not affect people and pets, excellent furniture essential, perfect mosquito net substitute.