5V USB to 3pin PC fan cable,one is USB port,the other one is small 3 pins(only 2 pins in connector required) case fan power adapter cable port. The fan must have a start voltage at or below 5V (fans with a higher start voltage will not work) 12V fans will be operated at a reduced 5V voltage for silent operation. The cable length is 30cm which is fit for mostly computer CPU fan.It can be used to power the PC case fan,CPU fan,5V small 3pin fan with a computer USB port or DIY modified laptop cooling pad fan. The rpm of the chassis fan will reduce 60% when connected this cable, a higher speed fan is recommended. 5V USB to 3pin PC fan cable made of Oxygen-free copper core. Cable Material Oxygen-free copper Connector A USB Connector B 3 pin.
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