Raid Yard Guard Mosquito Fogger gets rid of bugs and flying insects at the source for up to 6 hours. Our bug fogger spray kills flies mosquitoes non-biting gnats small flying moths wasps hornets and multi-colored Asian lady beetles. This backyard fogger backed by the power of Raid is for outdoor use only. It treats an area of up to 30 feet by 30 feet when used. Shake before using and spray this fogger when the air is calm for best results. Spend more time outdoors in a bug and mosquito-free area with the help of Raid Yard Guard.