This is an Aromatherapy Necklace with chrome hardware and an Amboyna Burl body. The cap unscrews to expose a wick and a chamber – just add your favourite essential oil (not included) to the chamber and it will diffuse through the opening in the cap. Includes spare wicks, a small jar for the oil and a velvet pouch (not shown). A great way to keep your favourite scent handy!