I purchased it to make an experiment of it. When I plugged it in, it did not make any effective impact on mosquito. Even it did not make noise. I saw mosquitoes setting on the top of it and searching about it. I purchased it for Rs-130/-. It was a total waste of money. So do not go for this product. You can use this money to purchase the substitute of it. The production company should test this product thoroughly before lunching it in the market.