Long-lasting fragrance with minimum waste – now it's possible with the new Glade PlugIns Plus air freshener. Discover new innovative air freshener designed with smart light technology that saves energy and fragrance. Designed with rest mode technology – an 8 hour rest cycle so you don't waste a scent when you don't need it. New refill indicator light alerts when it's time for a new refill – Glade PlugIns Plus lights up blue when a fragrance is low. The device turns off automatically when a fragrance is empty and the refill indicator light shows you that it's time to replace it. To customize the strength of your fragrance experience, simply rotate top of warmer to desired intensity, light will flash twice to confirm setting. A refill in the kit is an extraordinary, refreshing Aqua Waves scent, a multilayered composition of 9 notes crafted by master perfumers. Save electricity and fragrance and enjoy a wonderful, refreshing scent that fills your home with the new Glade PlugIns Plus.