AGEG 4" Mini USB Iron Fan with Aluminum Blades for Laptop Desktop Office Car Charger Power Bank Available (Blue) The smallest and lightest yet most powerful USB desk fan you could find out. Plug it into the USB port of your laptop or desktop, and it begins to work. High quality durable metal frame and fan blades. Head rotatable in vertical angle, with an ON/OFF switch on its back. Low power consumption, easy to carry.