Eco-Air is a powerful, battery-free air freshener dispenser for medium-size spaces. Eco-Air Dispenser outperforms gels, wicks and aerosols, using unique fragrances that are designed for consistent, powerful, 30-day performance. Eco-Air is freshness made simple. Solid refill (not included) is infused with natural fragrance oils so the air you breathe is chemical-free - no messy gels, liquids or residues. Eco-Air works great in conference rooms, entryways, restrooms and trash rooms. Simply mount it on the wall near a door so the natural airflow spreads the fragrance throughout the space.