To use, open the magnetic clasp on the right side of the locket to reveal the felt diffuser pad. Apply several drops of your favorite essential oil or essential oil blend to the pad. Close the locket and enjoy! Reapply oil when scent begins to wear off. Replace the pad every 7 days or whenever you change scents. Made with 100% surgical grade, nickel-free stainless steel. Crafted from polished 316L surgical stainless steel this essential oil diffuser necklace allows you to experience a gradual diffusion of your essential oils throughout your day, wherever you go. Whether you’re using essential oils as a natural perfume, or for therapeutic benefits, this diffuser necklace ensures you will look great while using them! Comes with 1 diffuser necklace, 22 inch chain, and three aromatherapy pads (White, Black, Yellow).