Powerful enough to freshen larger areas. The cover contains 2-3 times more fragrance than gels or metered aerosols. The motor driven fan moves air freshener further than a typical passive system, so you’ll freshen larger areas. Freshens consistently for 30 days. The smart chip controlled fan freshens consistently. Easy to use. Maintenance is simple with easy to use LED and audible re minders along with a push button cover for quick removal and replacement.