The Eco Air is a passive air freshening system that delivers a powerful, consistent freshness for 30 days. It is capable of freshening your largest spaces without any batteries or fans.No matter what you put it in, or where you hang it, the Eco Air cannot break or spill. It works well in restroom stalls, on restroom walls, conference rooms, entry ways, lobbies, trash rooms, or near soiled linens. Eco Air is also 100% recyclable and is part of a closed-loop recycling program that allows you to easily recycle.