Air Wick - RAC79717 Leave a lasting impression on guests and ensure a consistent experience using Air Wick Scented Oil Refills with Essential Oils. Keep supply rooms stocked with the pleasant scent your guests associate with your business or home. Get up to 120 days on the lowest warmer setting of a natural-smelling fragrance infused with essential oils. Easily refill your Air Wick plug-in warmer (not included) by unscrewing the cap and inserting the refill until it clicks. Adjust the warmer settings to emit the optimal fragrance in each room. Enhance entrances, common areas, offices, breakrooms and guest rooms with an appealing scent.