Ulgoo 4'' Table Desk Fan Mini USB Personal Fan Metal frame fan High Compatibility (Blue) This Desk fan is Perfect for the office, home, dorm, study, library, games room and so on Unique noise reduction in motor - Our USB fan runs smoothly and quietly It is pwered by a 3.9 ft USB cable,compatible with computers,laptops,power bank and other devices with USB output 4 Inch blade and 6 inch frame saves your desk space 360up and down head angle to get airflow from different directions.