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This small USB fan from Fancii is using wwin turbo Cyclone-Blade technology which provides a powerful yet quiet flow of cooling air. 25% quieter and 40% more powerful than similar models, this USB fan keeps you cool quickly and efficiently. Simply plug the included USB cable into your computer, power bank, or any USB port. Forget the hassle of batteries or use of an electrical outlet! When used with a power bank, this device can cool you down anywhere, anytime. Chic and sophisticated modern design adds a touch of style to any desktop and interior decor. It looks great on your office desk, bed stand, or even in your hands.