Active Air Care System is Fresh Thinking. Delivers fresh scent and odor control continuously and consistently for 60 days to help your business look, and smell, its best. Clean source of power that delivers intense, pure, fragrance without propellants, solvents or CFCs. Refills and batteries can even be recycled at the end of their useful lives. Deliver consistent and continuous levels of fragrance and odor control for the full life of each refill. Even works well in humid or arid conditions.