Simply plug in the Aromatherapy Vaporizer, and within minutes, you will be enjoying the true aromatherapy benefits of Aura Cacia's 100% pure essential oils. The room diffuser is a plug-in unit that uses low levels of heat to volatilize the essential oils.Apply five to fifteen (5-15) drops of your favorite essential oil, or blend, onto a vaporizer filter and insert into the diffuser. Plug in the diffuser to a 120 volt wall outlet and enjoy true aromatherapy benefits. Contains filter, .5 oz. bottle of an essential oil blend, operating instructions and essential oil brochure.