This powerful electronic pest repeller covers the whole building (up to 3000 sq. ft.), and is effective against mice, rats, ants and most other crawling insects. PS3000 is designed for use in pubs, offices, restaurants, hotels and other larger buildings. This unit is equipped with three pest repelling functions, including four powerful ultrasound settings allowing you to target the pest you don't want. The mosquito setting emits an ultrasonic signal, which deters mosquitoes in the room where the unit is positioned. Will not affect humans, cats, dogs, fish or birds.