1.mini PC usb fan 2.powered by USB port 3.flexible metal neck 4.soft fan blades,no hurt 5.on/off switch ... , plug and play 1.mini usb fan for PC, laptop, office use2.powered by PC USB ... air-condition for cool environment anymore, just with DC 5V fan, energy saving.10.Working Volt: DC 5V, Working current: ≤250mA11 ...