Freshens your car for 30 days - Otto makes any ride smell great for a full month since it contains 10X more fragrance than typical car air fresheners. A breath of fresh air for your car - Otto comes in three great fragrances allowing you to breathe easy no matter where the road leads you. Easy to use - Otto has no messy oils, gels or liquids that can break or spill and is a breeze to use. Simply open the package and place it under the seat (out of direct sunlight) for month long freshening.