From Pura, this set includes:  One Pura 4™ smart fragrance diffuser, Fresh Sea Salt refill, and Citrus Crush refill. 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. Pair with premium fragrances created with ingredients that are safe and clean Together, smart vials and Puralast™ technology deliver a scenting experience of up to 120 hours Adjust fragrance intensity, set schedules and timers, and more in the Pura app Get a consistent scent experience based on the temperature in your home  Fresh Sea Salt Vial: Watery sea salt and jasmine mingle with tangy green apple and musk for a scent that’s marine, floral, and fresh. Fresh Sea Salt scent notes:  Top: fresh green apple accord, watery sea salt Middle: jasmine, muguet, rose Bottom: sweet cream, musk, woods Citrus Crush Vial: Groves of sun-ripened citrus surround a blend of summer fruit, violet, and just a hint of sandalwood. Citrus Crush scent notes:  Top: Orange, mandarin, grapefruit, raspberry Middle: Peach, tropical fruit, cassis buds, strawberry Bottom: Sandalwood, violet Imported.