Raid Yard Guard Mosquito Fogger is an all in one bug killer. This bug spray is an effective insecticide that acts on flies, mosquitoes, non-biting gnats, small flying moths, wasps, hornets, and Asian lady beetles. Additionally, this outdoor mosquito fogger is an anti mosquito spray and overall insect spray that keeps killing for up to 6 hours. This insect repellent fog can treat an outdoor area up to 900 square feet.