Aromatherapy is believed to help reduce anxiety, relieve stress, ease depression, reduce pain, enhance sleep and more. This compact, portable diffuser operates silently and is perfect for home or travel. It comes with 4 essential oils (orange, eucalyptus, lavender and lemongrass). Simply add a few drops of oil to the diffuser, and enjoy the therapeutic benefits of aromatherapy. Requires 2 "AA" batteries (sold separately) or USB cord (included). Plastic. Measures 8 1/4"L x 3"W x 6 1/2"H.