The 60-Day Citronella Diffuser can be used anywhere in the home or garden. It is portable with an adjustable cover for controlled release. Use it in domestic premises or outdoor areas, including patios, porches, terraces and balconies. Adjustable release lasts up to 60 days. Portable for holiday travel. Covers up to 40 cubic metres. Adjustable slow release dispenser – adjust number of vents open.