Holo is a trendy and stylish diffuser.  Advantages Operates via a power outletDiffuses a fine mist of fragrance without heat, chemicals or pumps.Requires only tap water.Diffuses the benefits of essential oils.Humidifying power.Diffuses for 4 hours continuously.Automatic shut-off7 different lighting colorsCreates a warm atmosphere Usage Fill the diffuser with water up to the line and put 3 to 8 drops of your favorite Naturiste essential oil. Plug into electrical outlet. Press the diffuser to turn it on and enjoy the benefits of aromatherapy at your fingertips.