Features: USB interfaces to chassis fan 4pin wire length approx 30cm/11.8in, all coppered cored wire,durability. With computer USB interfaces, and the other end is a two-wire 4pin chassis fan connection. Please select this cable if you want to use the computer's USB port to supply power to the chassis fan. Please use this cable when you want to DIY the for case fan to modify the notebook cooling pad fan. The chassis fan must support 5V low voltages startups, that is to say: the USB 5V power can still run, in this for case, the adapter cable can be used. Specifications: 【Product Name】:USB to 4Pin Cable 【Product length】: approx 30cm/11.8in 【Wire Type】: 2464 22AWG 【Insulation material】: PVC insulation 【Specification】: 17x 0.15TS [Wire outer diameter]: OD3.5mm 【Rated temperature】: 80℃ [Wire color]: Black 【Product weight】: 10 grams [product interfaces]: one end of the motherboards 4pin, the other end of the USB interfaces [Product function]: Change the chassis CPU fan to the USB interfaces for power supply Package Includes: 1PC x USB to 4Pin Fan Cable note: The fan speed will be reduced by 60% when using this USB adapter cable for the for case fan.It is recommended to use fan with a higher speed when using this adapter cable. Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.