This Comfort Zone Portable Twin Window Fan offers versatile 3-speed control to generate a strong breeze or circulate air in your room with ease. The manually reversible fan can intake fresh air or exhaust stale air while the 7-inch dual blades and auto-locking accordion expanders fit most windows from 22-1/2 to 33 wide. The removable bug screen keeps out insects and debris and the carrying handle and removable feet allow for easy portability and tabletop use. With a timeless white design this energy-efficient window fan blends seamlessly with your home decor.