The Solid Air Freshener features an open-air design that creates maximum surface area exposure and space for air flow which provides effective and efficient fragrance release. Available in Xcelente lavender fragrance, as well as NABC Fresh, this solid air freshener doesn’t require any batteries and is effective for 30 days. Infused with natural fragrance oils, the Solid Air Freshener eliminates the need for messy gels or liquids.