DoubleThree Mini Table Desk Personal Fan (Metal Design, Quiet Operation Cable, High Compatibility) 4inchBlack Perfect fan for the office, home, dorm, study, library, games room The sturdy metal fan produces a soft breeze to keep you cool and relaxed Powered by usb cable - compatible with computers, laptops, portable chargers and other devices with usb output 4 Inch blade and 6 inch frame saves your desk space 1 Year replacement for product defect and live customer care 7 days a week provided by opolar