Easy Fresh Dispenser provides 30 days of freshness for medium-size spaces. Cover (not included) contains two to three times more fragrance than gels or metered aerosols. Motor-driven fan moves the fragrance further than a typical passive system. Easy Fresh is powered by a smart chip that controls the fan consistently, turning it sparingly the first week and gradually turning more frequently until the fourth week when it runs constantly. Maintenance is easy with LED\/audible reminders and a push-button cover for quick removal and replacement.