Sage and Citrus: This blend of earthy sage, luxurious talc and lemon-lime creates a natural harmony Continuous, room-filling fragrance lasts up to 30 days on low setting For use with a Yankee Candle ScentPlug Diffuser ScentPlug Refills are available in a variety of Yankee Candle fragrances Come home to an inviting combination of personal style and continuous fragrance. Just insert this fragrance refill into a decorative ScentPlug Fragrance Diffuser, plug it in, and you'll enjoy room-filling fragrance for up to 30 days. To use, simply remove the refill's cap and slide the bottle into the ScentPlug Base until it snaps into place. Rotate the base's plug to match your outlet, keeping the ScentPlug Fragrance Refill upright. When the oil disappears, it's time to replace!