"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. This kit comes with 1 V4 Pura Diffuser and 2 Capri Blue Volcano Pura Oil Diffuser Refills. --- Safe & clean scents: Pair your Pura Diffuser with premium Capri Blue fragrances created with ingredients that are safe and clean. --- Long lasting: Puralast provides a long-lasting fragrance experience of up to 120 hours. --- Smart features: Adjust fragrance intensity, easily switch between fragrances, set schedules and timers, and more—all from the Pura app. --- Adaptive diffusion: Get a consistent scent experience based on the temperature in your home."