Powered by solar energy during the day and by battery at night, the fan delivers 220 CFM airflow for full-air circulation. Supports multiple DIY mounting options for greenhouses, chicken coops, and pet houses. Aluminum-alloy housing design suit hot, humid conditions for stable, long-lasting performance. | Vevor | | Solar Powered Fan, 20W Solar Panel with Battery Storage, 220 CFM Airflow, Adjustable Panel Angle, 2030 RPM High-Speed | Best Buy