Black Flag Fogging Insecticide is specifically designed to be used with Black Flag, Burgess, Cutter, and Repel branded thermal foggers. The secret is in the microscopic particles the fogger produces - up to 7 times finer than mist! The fog floats and penetrates deep into landscaped areas where mosquitoes hide - killing mosquitoes on contact and creating a 'mosquito-free' zone for up to 6 hours. In about 5 minutes, the fog is gone so you can start enjoying the outdoors again. Takes an average of 10 minutes to treat a 5, 000 square foot yard. And the insecticide fog is nearly odorless! U This is the same effective system used by professionals to kill mosquitoes. For outdoor residential use only.