Black Flag Foggers deliver fast, effective, and long-lasting control of mosquitoes and flies. Ideal for backyard events like picnics, BBQs, pool parties, and more. Propane-powered for easy portability with an auto-start button. Produces a 10-foot cone of odorless fog that clears bugs in minutes and keeps areas bug-free for up to 6 hours. Uses the same system professionals rely on to kill mosquitoes that may carry the West Nile virus. Kills and repels mosquitoes, biting flies, and other flying insects.