Pura is the future of home fragrance. With a sleek, modern redesign on the outside and new technology on the inside, Pura 4 delivers the best scenting experience possible. The new Pura 4-upgrades coupled with Puralast technology lets you get the most out of every fragrance. Automatic vial detection for fragrance-specific diffusion delivers a scenting experience that's tailored to your space and preferences. It is a Wi-Fi enabled, controlled by your phone fragrance diffuser. You get precise control of your scent intensity with premium, designer grade fragrances all through the Pura scent experience. You can swap between 2-fragrances to avoid nose blindness and to always keep your home smelling fresh. With the Pura app, you can control your devices from anywhere and change the LED ambient nightlight to any color you please. Pura fragrances are formulated using naturally derived scents from plants, herbs, and fruits. The ingredients are sourced from around the world, with a strong focus on growing ingredients in regions where we can have a social impact. Each recipe is reviewed and tested by our fragrance house's perfumers and scientists to ensure that everything we offer is clean and safe around kids and pets. Each fragrance vial will last up to 120 hrs depending on what intensity you set your device at in the Pura app. You can set custom schedules and use geofencing to help your fragrance last longer and only run when you want it to.