The only smart plug-in designed with smart light technology for minimum waste of electricity and fragrance, Designed with rest mode – now two working modes to choose so you don’t waste a scent: continuous or 8 hour rest mode cycle that saves energy and scented oil when you’re out, Designed with auto shut-off, turns off when fragrance is empty, Designed with refill indicator light that alerts when it’s time for a new refill, A warmer is compatible with all Glade PlugIns scented oils refills available in various fragrances, The most energy efficient warmer!* (*vs US market warmers, on low setting during a 24 hour period)