LorAnn's unscented reed diffuser base has been designed to work with most fragrance oils and essential oils to give off maximum scent with your reeds. Simply blend your favorite fragrance oil with the diffuser base and insert the reeds (sold separately). The sticks absorb the fragrance and the scent evaporates through the air. Turn the reeds periodically to refresh the scent and to help saturate the reeds. Reeds sold separately.