1. It repels mosquitoes, lizards, mice, cockroaches, flies, ants and other household pests completely. 2. The effective area it covers is 1000sq.ft. 3. Wango negative ions help to remove dust bacteria from the air you breathe in your home. 3. Moderate ozone to neutralize air such as smog, exhaust, tabacoo smoke and pollens etc. 4. Its ultrasonic sound waves attacks the auditory and nervous system of most common pests causing them pain and discomfort. 5. The high pressure sound will chase mice, mosquitoes and other pests from their shelters and throw out them from the house.