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, can show customer's word 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 any direction you like5.Two pcs of soft blades, ...