9 In. twin window fan provides high volume air movement. Use as a floor/table, or window fan (snap on feet included). Lightweight, comfort-grip handle, fits windows from 25 In. to 35 In. E-Z-Click side panels for safe, custom fit. Whisper quiet 3-speed manually reversible motor. No assembly required for window installation. Durable impact-resistant construction. 1200 cfm (cubic feet per minute). 5-1/5 In. W. x 11-7/8 In. H. x 24-1/2 In. L. UL (Underwriter's Laboratories) listed.