Black Flag Flying Insect Killer Aerosol Spray, 18-Ounce Black Flag Flying Insect Killer 18oz Black Flag Flying Insect Killer kills fast plus kills insects landing on treated surfaces for up to 4 weeks For indoor or outdoor use, it also, kills mosquitos Clean fresh scent use indoor and outdoor Kills fast and keeps killing for up to 4 weeks Keeps killing for up to 4 weeks Clean, fresh scent Use indoors or outdoors