Small but Powerful USB Desk FanSmall in size and powerful in wind power beyond your imagination. Answer: Level 1: 3.9 m/s. B: Level 2: 4.9 m/s. C: Level 3: 5.9 m/s. Make your summer cooler!3-Speed Optional USB FanLow: Comfortable sleep. Medium:Natural air volume suitable for work and study. High: Enjoy the strong wind of nature. The small and exquisite appearance of the table fan not only brings you a cool feeling, but also decorates your desktop.[<35dB ultra-quiet, 45% quieter thanordinary fans] The 5 curved blades of the silent desktop fan are made of high-quality materials and equipped with a silent brushless motor for quiet operation. The peak sound is less than 35dB, so you won't feel disturbed while sleeping.3.5 Inch Compact Size & 180 Adjustable Desktop FanThe portable desktop fan is only 3.5 inches and can be stored in a folder or easily thrown into your bag. It can rotate 180 to provide the most suitable air outlet angle, allowing you to quickly cooldown.[USB Powered - USB Desk Fan is Silent and Powerful] Equipped with USB cable, compatible with 5V output devices. Connect it directly to laptops, desktops, power banks, adapters and other USB power sources. (Note: This fan does not include batteries.Summer GiftIdeal USB fan for hot summer, suitable for children, the elderly and women, also suitable as a gift. Special Care for WomenIf you or your wife or your mother suffer from menopausal hot flashes, this portable handheld fan can perfectly solve the special situation of recurring hot flashes and night sweats for you or your wife or your mother. age. This is the most desktop fanatic