GOTD Flexible USB Mini Cooling Fan Cooler For Laptop Desktop PC Computer, USB Power, DC12V, Length 12.2inch (Green) Blade Material: Plastic. Total Length: 31cm / 12.2inch. Blade Length: 10cm / 4.0inch. Compatible with USB 1.0 and USB 2.0. Volt: DC12V. Current: 0.18Az. Working longevity: 50,000 hours. Plug and play; no driver installation required. Powered by USB port, low power consumption. USB connector to your PC or notebook, then simply turn on your, PC or notebook to power the USB fan. Flexible metal tube, can change the direction of fan as your wish. USB power, no battery required.