Stay cool and keep air circulating with the reliable MAINSTAYS Twin Window Fan. Built for flexibility, it can pull in fresh outdoor air or be manually reversed to push out warm, stale air. The three-speed control dial lets you easily adjust airflow to your liking, while expandable accordion panels provide a secure fit in most windows. A convenient carrying handle makes it easy to move between rooms, and the included attachable base feet allow the fan to stand on its own for added versatility.