The Pura 4™ smart fragrance diffuser uses innovative smart features paired with premium, clean scents to give you the most modern, customized, and high-end scenting experience possible. Simply insert your smart fragrance vial and Pura 4 automatically detects the fragrance, creating a seamless swapping experience. This set includes two premium Open Air Tech scents (10 mL each) and a Pura 4™ smart fragrance diffuser.