Details: White Howlite Stone Beads; Black Lava Rock Stone Beads; Decorative Gold Charm Bling; 18K Yellow Gold Ion Plated Stainless Steel 6-7 Inch Circumference Simply place 1-2 drops of your favorite essential oil directly onto any of the natural rosewood or lava beads on your Essential Collection Bracelet and enjoy the therapeutic benefits of your oils all day. The scent will diffuse for 1-2 days depending on your oils. Some oils are stronger than others, therefore, some can last longer.