2PCS PWM Fan Splitter Cable 1 to 2 Converter, FBHDZVV 4 Pin Black Sleeved Splitter Cable Case Fan Braided Y Splitter Power Fan Extension Power Cable for Computer ATX Case Cooling Fan Cable

The PWM fan cable is designed with a 4-pin female on the motherboard and splits the signal to 2 PWM fans, it splits into 3-pin and 4-pin connector, fans can spin at the same speed using software from a motherboard equipped with PWM control.
The 1 to 2 case fan splitter connects design of the extension cord to increase airflow in your computer case, provides better power supply for motherboard fans, supports PWM function, reduces the accumulation of heat within the frame and satisfies all your control needs to increase the lifespan of the motherboard.
4 pin fan connector a wire that sends the RPM signal to the motherboard connector for synchronizing the fan speed with the other fan; and one 3 pin fan connector omits the RPM signal pin for tandem fan speeds with both fans.
Support 4-pin and 3-pin fans cable, the 1 to 2 splitter fan power extension cable compatible with 4 pin and 3 pin PC case fans.
Plug-n-play, easy to plug, the fan extension cable offers greater flexibility between motherboard and CPU cooling fans.