The sprayer unit has a default setting which causes it to spray every 15 minutes.
You can change this schedule if you want to.
The sprayer requires two "D" batteries to operate, which are not included.
Installing your sprayer near your fan, will help distribute the spray.
Ours is installed right below our evaporative coolers.
Each canister of fly spray will last about 30 days.
Purge spray is not included with the sprayer and must be purchased separately.
The Purge spray contains pyrethrums.
The pyrethrums do not harm any animals or plants.
But should not be sprayed directly on animals.