This is an interchangeable necklace with either the harmony bell for a beautiful sound or a lava disk to wear your favorite essential oil scent. It is a tradition in many countries that an expectant mother wears one so the baby in the womb can be soothed by its sweet soft sound. Your angels will be protecting you with this beautiful necklace. This Om necklace set includes the Om pendant, a red harmony bell, lava bead for aromatherapy, & 31" silver plated brass chain.