Now a days there are lots of mosquitos and cockroaches are there because of not cleaning envourment properly. I would like to share my personal use of this sprayer. When my room have lots of mosquitos they comes because of a canal that place in front of my house. I see advertisement on tv and I thought to buy it and I go to the store and buy it. When I use this they senceless for some times and after 1/2 hour they again comes to bite. It cant be usefriendly. Such a irritating product. How much time you have to wake up time to time in night and spray it. Such a worst product. I recomend you to dont use this product any more. Thank you.