Each coil burns 5 to 7 hr Outdoors place one coil every 10 ft Coverage Area:10 ft Includes:(4) Mosquito Coils and (2) Stands Pack of 6 Mosquito repelling coils helps to repel mosquitoes in confined areas outdoors. It is useful in places where there is little or no breeze such as patios and porches. Do not use indoors.