Here is your total solution to keep mosquitoes and other bugs out of your homes, hospitals, hotels, hostels etc., even with your door wide open... It is safer to use than spraying insecticides in your room(s). It is also economical and easier than other methods of killing insects. Great on wooden doors, Perfect on metal doors. Suitable for single doors, sliding doors or caravan doors. Easy to put together, no tools required. Folds up for easy storage.