Fits Glade and many automatic sprays. 60 days (based on 36 minute setting with sensor in off position [on applicable models]). Also fits: Air Wick, FreshMatic Ultra, Ultra I-Motion, and Lysol Neutra Air FreshMatic sprays (purchased before September 12, 2010) or your money back! (Airwick, Lysol and related brands are registered trademarks of Reckitt Benckiser line. This product is not authorized, sponsored or endorsed by Reckitt Benckiser line.)