Safer than burning candles, this scented diffuser works with these little hard fabric re-useable pads. You drop your scented oil on the pad, put it in the ball and plug it in to an outlet. I use one in my office and every morning i put a few drops of a few of my favorite The Body Shop oils (Lemon Basil, or Jelly Bean mixed with Sparkling Pear, to name a few).. The pad is warmed and the heat is dispursed in a nice even manner. I prefer it to any plug-in, or desktop scent maker.. Plus, you can keep a supply of your favorite scents and make it stronger, or weaker – depending on your preference. I bought mine from The Body Shop, but they dont sell them on their site online – you can buy it from Amazon.com