and Function: This cable is 5V USB port to large 4pin fan cable with it allows you to power most compatible with case fans by using a USB connection, large 4pin compatible with case fan power adapter cable both OK.Connector: One is USB port, another one is large 4pin compatible with case fan power adapter cable port.Fan must have a at or below 5V (fans with a will NOT work), 12V fans will be operated at a reduced 5V compatible with silent operation.You can use this line to supply power to the chassis fan by computer's USB port, or DIY the chassis fan to modify the notebook cooling pad fan.Name: 2 way USB to large 4Pin lineWire model: 2464 22AWGConductor specification: 17x0.14TSWire outer diameter: OD3.5mmRated temperature: 80Note:The fan must Have a of or less than 5V (fans with a will not work).The chassis fan uses this USB adapter cable, the fan speed will be reduced by 60%,It is recommended to use a fan with a speed when using this adapter cable.Function: Change the CPU fan of the chassis to a USB interface compatible with power supply and use(When some friends want to use the computer USB interface to power the chassis fan, please select this cable. Or if you want to modify the chassis fan DIY to a laptop cooling pad fan, please use this cable.)Attention:1. When using this USB adapter cable compatible with the chassis fan, the fan speed will be reduced by 60%. It is recommended to use a fan with a higher speed when using this adapter cable2. The Computer fan must support 5V low-voltage startup, that is to say, the USB 5V power can still operate, in which case the adapter cable can be used. Otherwise, even if there is no problem with the wires, the fan will not turn.Colour:BlackMaterial:PVCPackage Contents:1 x USB to big 4 Pin Adapter CableOnly the above package content, other products are not included.Note: Light reflection and different displays may