10/100 BaseT 1P/2J Type 7 Wiring Splitter, Pigtail TypeThis Cat.5E splitter adaptor allows two computers to share one Cat.5E port.Supports one active connection at a time.This product is not for sharing one Ethernet port and run 2 PCs simultaniously.If your router has only one RJ45 port then you need Ethernet switch to run multiple PCs at the same time.