The Rubbermaid Commercial SeBreeze® odor-absorbing gel fragrance cassettes efficiently absorb odors in the air. This air freshener then converts them to odorless, nontoxic compounds. The light neutral scent is nonobtrusive. Designed for 24-hr. odor control in high-traffic or commercial restrooms for a full 30 days. Each cassette canister includes a battery for easy, 1-step replacement. Cassettes fit the No. 4EU59 portable fan system, sold separately.