This IDE to 3pin splitter cable is intended for connection of 4 ports 4-Pin PWM device (CPU cooler, case fan...) to a PSU connector (4-Pin Molex). Solve the the D-type plug fan cannot be connected to the governor. Product function: The actual fan with 4P interface can be plugged into the motherboard 3P fan socket to get , or connected to the chassis fan speed controller. The general chassis fan speed controller interface is small 3P or small 4P, and cannot be used with 4P fans. Connection, through this line can solve the connection problem. IDE : The big 4PIN male head is connected to the big 4P female socket of the fan. 3Pin connector: 3PIN male connector to governor 3P connector Output voltage: 12V Colour:black Material:PVC+22AWG tinned copper wire Size:Length: Approx. 10cm Package Contents: 1 x cable Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.