Essential oils portable diffuser & aromatherapy kit fits in the palm of your hand and comes with everything you need to experience the amazing fragrances of 4 different oil scents. Lime, Eucalyptus, Peppermint, and Tea Tree Oil are all included. Perfect for aromatherapy or massage therapy. This quiet unit may be powered by 2 AA batteries (not included), or by the USB cord which is included. The oils are rich in scent and provide a wonderful variety of aroma which you will enjoy. Great to use on your bedside table while falling asleep, or at your desk while working. Connect it to your computer for power and find yourself transported to a fragrant field of flowers far away.