Raid Flying Insect Killer is specially formulated to kill a number of flying insects: Asian lady beetles, boxelder bugs, flies, fruit flies, hornets, mosquitoes, non-biting gnats, small flying moths, wasps, and yellow jackets. Raid Flying insect spray kills on contact and can be used both indoors and outdoors. Attack flies and mosquitoes with no lingering chemical order and an Outdoor Fresh scent. Raid Defense System helps you work smarter, not harder, to fight bugs.