Pura Smart Home Fragrance Diffuser Refills (Pack of 2): Refill your Pura fragrance diffuser with the fresh fragrance of Thymes Frasier Fir. Each Pura fragrance refill is intended for single use. These long lasting scent refills for your Pura smart device will last up to 350 hours or 15 days on medium intensity. (Listing is for 2 Pura refills. Pura diffuser sold separately.) | | Frasier Fir Pura Scents: These refills are scented with the aromatic snap of crisp Siberian fir needles, heartening cedarwood and relaxing sandalwood; add this warm, rustic fragrance to your holiday or everyday home decor. | | Pura Smart Diffuser: The Pura diffuser plug in allows you to customize your aroma experience from the convenience of your smartphone. Adjust the scent intensity, set custom schedules, and swap between scents within the Pura app. The Pura smart plug diffuser does require a Wi-Fi connection for setup and operation. The diffuser plugs into any 110V AC outlet and does not require batte.