Product Overview: 1. Application of this product: 1. Flour processing factories, food processing factories, rice factories, pharmaceutical factories, animal feed factories, granaries, etc. who cannot use poison bait and pesticides ; 2. Households plagued by rodent and insect pollution Theaters, restaurants, supermarkets, department stores, hotels, hospitals, etc. 3. Grocery stores, clothing stores, food stores, furniture stores, etc. often bitten by rats and insects ; 4. Villas, houses, air-conditioned rooms, canteens and storage rooms of government agencies and units. 2. Matters requiring special attention: 1. The machine should be installed at a distance of 20-80cm from the ground, and should be inserted into the socket perpendicular to the ground ; 2. The installation point should avoid sound-absorbing materials such as carpets and curtains as much as possible to prevent the reduction of sound pressure from reducing the sound range and affecting the insect-repellent effect; < p> 3.