2 Electric Refill Oils * A convenient way to make sure you always have a reserve on hand so you never run out. Plus, they make it easy to enjoy your favorite authentic, true-to-life Yankee® scent in multiple locations. Replace after 4 to 6 weeks. Contains two bottles of scented oil. * For use with all Yankee electric frangrance unit air fresheners * Autumn"s freshest bounty ... sweet berries, juicy apples, succulent peaches and warm spices.