Designed for indoor use, Precor® Plus Fogger treats large spaces and is well-suited for professional flea control in hard-to-treat areas. This product features dual active ingredients; permethrin provides quick knockdown of adult fleas and the insect growth regulator (IGR) (S)-methoprene prevents pre-adult fleas from creating new infestations. Precor® Plus Fogger is the ideal insect growth regulator for flea control as it prevents infestations for up to seven months.