The main technical parameters:1. Model : New ultrasonic mosquito repellent2. Operating voltage: AC 90V-250V/ 50/60HZ3. Power : 5W4. Output frequency: 50kHz - 60kHz5. Actual coverage: 80-120m2 (open space) Precautions:1. The machine should be installed 20-80 cm from the floor and it is necessary to insert the socket perpendicular to the floor;2. The installation point should try to avoid sound-absorbing materials such as carpets and curtains, in order to prevent the reduction of sound pressure from reducing the sound field and affecting the insect-repellent effect;3 . In the first days of use, if the activities of mice and pests increase significantly, it is a normal phenomenon. Because the rats and insects that usually hide in the nest escape from their original hiding places after being attacked by ultrasonic waves and electromagnetic waves;4. The machine is directly plugged into the mains socket for use (voltage range: AC90V~250V, frequency: 50Hz~60Hz);5. Note: Moisture proof and waterproof;6. Do not use strong solvents, water or wet cloth to clean the body, please use soft dry cloth dipped in neutral detergent to clean the body;7. Do not drop the machine or subject it to strong shocks;8. Operating ambient temperature: 0-40 degrees Celsius;9. If placed in a warehouse or a place where goods are stacked, or on a floor with multiple rooms, several additional units of this machine should be placed to increase the effect. Applications of this product:1. Flour processing factories, food processing factories, rice factories, pharmaceutical factories, animal feed factories, granaries, etc. where toxic baits and pesticides cannot be used;2. Theaters, restaurants, supermarkets, department stores, hotels, hospitals, etc. plagued by rodent pollution;3. Grocery stores, clothing stores, food stores, furniture stores, etc. often bitten by rats and insects;4. Villas, houses, air-conditioned rooms, canteens and storerooms of government agencies, etc. Package contains:Ultrasonic pest repeller mosquitoes * 4PCS