This product is easy to use. You get all felt colors with each diffuser. They come in their individual packages. I chose the color of the felt, put a few drops of my favorite essential oil on the felt, opened the front of the diffuser and placed the felt circle inside. Once that was done, I placed it on my car's heater/vent. Did. I enjoyed the scent for a couple of weeks and then added some more oil. Works well.
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