The Black Flag 190095 Propane Fogger (NEW VERSION) is small, lightweight, and easy to operate with no electricity required. The secret is in the microscopic particles it produces - up to 7 times finer than mist! The fog floats and penetrates deep into landscaped areas where mosquitoes hide - killing mosquitoes on contact and creating a 'mosquito-free' zone for up to 6 hours. This same effective system is used by professionals to kill mosquitoes. In about 5 minutes, the fog is gone so you can start enjoying the outdoors again. The fogger is ideal for backyard parties, camping, and outdoor picnics. To operate, while outdoors fill the insecticide tank with Black Flag, Cutter, or Repel branded insecticide; push the auto start button to start fogger; and let pre-heat for at least 2 minutes. Keeping fogger upright and level, simply pump the trigger at the rate of once every 3 – 4 seconds as you work your way around the outdoor area you wish to treat.  An average sized space (5,000 square feet) can be treated in less than 10 minutes. For outdoor use only.