The Black Flag 190107 Electric Fogger is small, lightweight, and easy to operate - just plug in. 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. To operate make sure the trigger is locked. While outdoors, fill the insecticide tank with Black Flag, Cutter, or Repel branded fogging insecticide. Plug in fogger using a proper gauge extension cord and let pre-heat for at least 2-3 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. For outdoor use only.