Balsam, aromatic cedar wood, and juniper berry blend together in a fresh forest scent. 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 which are designed to fit both Yankee Candle Electric and Electric 2 home fragrance units.