The Easy Fresh 2.0 Programmed Dispenser Cabinet ensures a consistent level of fragrance is released for a full 30 days. Using “smart” technology, the Easy Fresh ensures that fragrance isn't too strong on day 1 and not too subtle on day 30. The Easy Fresh is the only air freshener dispenser that uses the fragranced cover of the dispenser as the air freshener refill itself. (Cover sold separately).