Slim 20 inch box fan provides high volume air movement Energy-efficient fan helps keep you feeling cooler while spending less than 2¢ per hour to operate Top-mounted manual controls are easy to reach 3 high-performance fan speeds Weather-resistant motor for worry-free window use Durable steel frame Safe, rounded corners Equipped with Lasko's trusted, fused safety plug Use in conjunction with an air conditioner to boost cooling airflow 1-Year Limited warranty