Solid air freshener dispenser doesn't require any batteries and is effective for 30 days. Open design promotes airflow. The refill is a solid that has been infused with natural fragrance oils so there's no messy gels or liquids. Refills are recyclable and do not contain any propellants or acetone. Material(s): Plastic; Color(s): White; Height: 5.5"; Width: 2.62".