This Aromatherapy Diffuser Necklace - Hand of Fatima will allow you to wear your favourite essential oil or one of our special blends wherever you go while also experiencing the positive health benefits they provide. The locket contains a tiny piece of pad which holds a few drops of oil that slowly diffuses through the ventilation holes on the front. The scent of your oil can last for several days, but you can always top up more oil to the pad after the oil has completely diffused.