Quick and easy way to help remove damp and improve air quality. The special crystals draw moisture and damp from the surrounding atmosphere trapping it inside the dehumidifier, It is especially useful to dry out small spaces with little air movement, reducing condensation and preventing mould and mildew building up. The dehumidifier is ideal for use in wardrobes, cupboards, storage boxes and under sinks where damp is an issue. Can also be used in caravans and boats in winter months when damp is most prevelant. Dependent on the levels of dehumidity in the atmosphere, the product may last for between 3-6 weeks. Not recommended for bathrooms.