... ,no hurt 5.on/off switch, plug and play USB fan with program flashing word, can show customer's ... as required 1.mini usb fan for PC, laptop, office use2.powered by PC USB 5.0V or any USB hub3.Built in on ... /off switch, 5 led lights4.flexible metal neck, you can adjust to ... heat operation, good for study, work or game.9.USB plug and play, it is not necessary with air- ...