The Pura Smart Home Fragrance Diffuser allows you to customize your scent experience with premium designer grade fragrances from the convenience of your smartphone. Pura fragrances are thoughtfully designed to never include harsh chemicals or any ingredients known to cause potential harm to health or the environment. Upgrade your home fragrance experience with a single pack Linens and Surf Yuzu Citron Simply Lavender Pacific Aqua Vanilla Chiffon Asian Woods and Spice or Pink Jasmine refill. One vial lasts up to two weeks running 8 hours a day at a level 5 intensity.