展开The Pursonic Essential Oils can be used with compatible aroma diffusers or many humidifiers, by adding a few drops of oil to the water. The diffusers and humidifiers will release a scented vapor into the atmosphere, which will give you a spa-like feeling in any room of your house or office. Diffusers and humidifiers sold separately. Set of 12 essential oils including Bergamot, Coconut, Eucalyptus, Frankincense, Jasmine, Lavender, Lemongrass, Peppermint, Rosemary, Rosehip, Sandalwood and Tea Tree 0.34 oz. each