... wind , super quiet.2.5V USB power supply, plastic shell,very safe.3.New generation of DC brushless technique,power ... .1W,energy saving.4.Fan 's life can be 25000-30000 hours, can be used continuously with long time5..Smart support ... room,stable structure, easy to place. 9.Appearance delicate, can be used in any occasion.10.Soft wind, cool and ... size:60×365×65 mm super quiet mini fan battery for laptop