The Black Flag 190095 Propane Fogger is small, lightweight, and easy to operate with no electricity required. The secret to fogging is in the microscopic particles it produces, up to 7 times finer than mist. When applied before dusk or dawn, the fog floats and penetrates deep into landscaped areas where mosquitoes hide – killing on contact and creating a mosquito-free zone that lasts up to 6 hours. The same effective system used by professionals to kill mosquitoes that may carry Zika or West Nile virus Kills and repels mosquitoes and biting flies for up to 6 hours Safely enjoy your yard in just 5 minutes (after fog dissipates) with no offensive odor - safe for you, your family, and your pets Propane powered for ultimate portability - uses either tall (14.1 oz.) or short (16.4 oz.) canister - no electricity needed Auto ignite button is as easy as a gas grill to operate Ideal for backyard parties, camping, and outdoor picnics Note - for outdoor use only