We use essential oil, not just fragrance, so it actually cleans germs in the air as it fragrances. Includes an 8 oz bottle of therapeutic grade lavender essential oil in a diffuser base, a glass jar, and a set of reeds with dried lavender stems. Each bottle of oil lasts about a year. Use half the bottle at a time, and replace after six months or whenever the oil has evaporated most of its scent.
You can also purchase replacement oil separately for $28.