The Aromatherapy Modular Infusion system (abbreviated to AMI) is an innovation from the Insignia creative team to allow the user to infuse essential oils directly into the shower cabin. Simply pour 5ml of Insignia's specially created essential oil (never use non approved oils - read here) onto the diffuser pad, turn on the steam, and once the steam begins, the aroma will infuse the steam and create a delightful fragrance throughout your steam experience.