... power button 5V DC from the USB port or AAAx2 battery power support. min fan, flash mini fan,with standusb ... flashing fan, flash fan,mini USB fan, led flashing fan, usb giftON/OFF ... in hot weather Flexible metal-neckFor PC/notebook with USB port Portable and easy to useIdeal as gifts or ... and so on.can customized flashing logo accordingly usb min fan