EASY TO USE: No need to Loosen the cover. Just apply 3 to 4 drops of your favorite essential oil or perfume on top of the wood and wait for it to be absorbed.The diffuser is made of high quality natural wood. Eco-friendly and simple in design, it creates a natural and harmonious charm.Use your favorite essential oil,aroma is around you, which can properly alert the nerves and delight the mood.Package Include: 2 pieces of Diffusers (Essential Oil not includeded)You can place the diffuser in your car, home, office and so on. It can not only provide you a pleasant aroma, but also be used as a decoration.