ITEM NAME:4 Pin IDE 1-to-3 IDE Female Power Supply Splitter Exentsion Adapter Ca â„–[.Connector: 4-pin IDE to 3 IDEs. Uses: The power plug (large 4P) is not enough, you can also be used to extend the chassis fan D port is not enough long enough, and so on. Mainly to extend and extend the large 4P interface.