1.flashing usb fan 2.powered by USB port 3.flexible metal neck 4.soft fan blade,no hurt 5.on/off switch, plug ... and play USB fan with program flashing word 1.mini usb fan for PC, laptop, office use2.powered by PC ... and play, it is not necessary with air-condition for cool environment anymore, just with DC 5V fan, energy saving.10.Working Volt ...