Note: One Pair RJ45 splitters Must be used Together, Only one piece could not accomplish two devices with network at the same time. Easy to operate,save cost,configure and use. This rj45 network splitter adapter is not the same as a network router or network adapter, it doesn't have the function of the assign IP addresses.Three Connection Ways: 1. Two computers to share one Ethernet line AT SAME TIME 2. Routers and set-top box can be simultaneously networked 3. Make use of routers to loop the signal to other devices. RJ45 Network Adapter Connection method: if two computer need internet stimultanously, so when the router away from the computer, only need one 8 core cable in the middle of two rj45 splitter, but you need two computer at the same time, please using this method, as picture 4 instruction. Note: Installing and using this pair of adapters, pay attention to the port, port 1 corresponds to port 1 , port 2 to port 2, can't be reversed. The rj45 ethernet splitter 1 to 2 adapter divide original embedded Ethernet cables (8pins) into two groups (1234/5678). Two groups respectively transmit data with purely physical connection which don't have the function of the assign IP addresses. This rj45 splitter adapter is mainly used to solve the connection problem caused by insufficient wiring, and it can make two devices surf the Internet at the same time by means of the physical tapping method. Note: (Two Female Port Workable Simultaneously).