Plug the Royal Sovereign 4 in. USB Fan into your laptop or desktop with the convenient USB cable and keep your workspace cool with ease. The quiet fan won’t distract you, and the flat-folding design means you can take it wherever you go without taking up space.Additional information:Cools heat coming from computer systems Quiet operation Folds flat for storage and portability Protective safety grill cETL listed Plug into laptop or desktop. Ideal for cubicle and office use. 4 in. USB fan. 1 speed setting. Plastic construction. Dimensions: 7.9W x 5.9D x 1.4H in.. 1-year limited warranty.