USB Fan Stepless Governor Fan Speed Controller Multi-Gear Auxiliary Cooling Tool with Male Female USB Type-A Adapter DC 4-12V
https://www.vogueparade.com/shopping/EN/4001/1/1005002470054463/usb-fan-stepless-governor-fan-speed-controller-multi-gear-auxiliary-cooling-tool-with-male-female-usb-type-a-adapter-dc-4-12v//