Bayer Advantage Household Fogger Kills Adult And Preadult Fleas For 7 Months. Remove pets and unplug and cover fish tanks before use. Use a fogger for each room. Use a spray for under furniture and behind curtains. Leave the area for at least 2 hours after fogging then air out well. Vaccume before and after fogging. Contains Pyrethrins, (S)-cyano(3-phenoxphenyl)methyl-(S)-4-chloro-alpha-(1-methylethyl)benzeneacetate, Piperonyl butoxide, N-Octyl bicycloheptene dicarboximide, 2-(1-Methyl-2-(4-phenoxyphenoxy) ethoxy) pyridine. Contains 3 x 2 Oz. Foggers.