1. This machine should be installed at 80-120 centimeter away from the floor. 2. The installing point should be avoided from carpet, curtain etc., attaching sound material or else, the decrease of the sound pressure will do harm on the helminthes effect. 3. It's normal that the mouse and vermin will increase at the beginning of the using days. Because they will get away from their living please after the attack of the ultrasonic. 4. Generates ultrasonic and electromagnetic wave, changes frequency irregularly, rats and pest won't be used to the frequency 5. Effective area (open air): 120 square meter 6. Electro-magnetic wave frequency: 0.8-8Hz 7. Ultrasonic wave frequency: first wave band:9-40KHz (bionic wave) 8. Second wave band: 20-70KHz 9. Power source: AC 90V-240V 50-60Hz 10. Average power consumption: <=6w
