The Air Wick Essential Mist Water Fresh Breeze is ready to change your essential oil into a light mist that will fill an area with this fragrance.  This package comes with 1 diffuser,1 refill and 3 AA batteries ready for assembly right out the box. Based on the lowest setting, the refill is set to provide up to 45 days of freshness for any room that you choose. Illuminating blue light will let you know when the product is on, changes when you select another time and that is about to spray. Great to use when having guests or an everyday odor remover!