The ultrasonic wave repellent drive away flying insects like house-fly, mosquito, bugs, crisket and etc. within 200 sq meter. This item widely applies in family, dinning room, hotel, hospital, office building, storage, farm and other indoor place. Product first should be installed in the pests of the most serious area, when the region the pest elimination after installed on the product for a complete set of housing relative to the central location (such as sitting room) or pests are most likely to come. The product should work 24 hours a day during use. No Radiation, AI Chip, Energy Saving, No noise. 1. Power supply: AC100-120V AC210-230V 2. Power supply: 50mA -80mA 3. Rated power: 5-8 (W) 4. Ultrasonic frequency: 24KHz-85KHz 5. Suitable for many occasions, will not cause any harm to human body 6. Wide-range frequency conversion sound wave coverage 7. Electromagnetic waves interfere with rat auditory nerve 8. Frequency conversion to stimulate the rat nervous system 9. High power penetration is stronger 10. Product size: 110x54x63 mm 11. Weight: 98.5 grams Package list: 1*Pest Repeller, 1*user manual.