It's hot summer time now. Cockroaches, mosquitoes, mice or something like that can be seen almost everywhere. They are disgusting, insanitary, especially for children. Because mosquitoes transmit malaria, rats may carry the virus and cockroaches spread bacteria.....They are dangerous sometimes! For the sake of your and your family's health, you need this Ultrasonic Electronic Pest Repeller, and create a clean and healthy living environment for them. The greatest love always lies in the details.