One Divinded into
Two: one 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
Keep Same Speed: 4-Pin receptacle connects to the 4-Pin header on the motherboard and splits the signal to 2 PWM fans; Fans can spin at the same speed using software from a motherboard equipped with PWM control. The fan adapter is compatible with 3-pin and 4-pin PC fans.
Increase Airflow: This PWM fan splitter cable connects 2 computer case fans to a single motherboard fan header to increase airflow in your computer case, adding ventilation and regulating the fan speed in a computer case.
High quality: The cooling fan cable is covered with fine plastic for long-term years' use. High density black sleeved able, 24AWG.
Compatible with popular brands of computer case cooling fans