1. This machine should be installed at 80-120centimeter 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 is 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. Use one unit per average-sized room with a pest problem. Additional units will be required in larger areas. 5. Effective range: 120-150 square meter. 6. Frequency ranges: 25K-55KHz. 7. Power frequency: 20-80Hz. 8. Input voltage: AC 90V-240V /50-60Hz. 9. Power: 2-3W.
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