Lasko's 20" Power Plus Box Fan, in classic black, features the powerful Weather-Shield motor for worry-free indoor window use. Its invative Wind Ring system is engineered to provide 20% more air velocity. Three fan speeds allow you adjust the airflow from whisper-quiet to a powerful high setting for quick room circulation. A wide, steel body maximizes stability and durability. Easy and convenient carry handle with switch knob makes portability a breeze. Equipped with Blue Plug safety fuse technology, making this fan a safe and an energy-efficient option. 2-year limited warranty.