USA Seller, Ship Fast! 100% Brand New And High Quality:Using gold-plated core to ensure transmission of signals. Feature：Three network cables can be connected into a longer cable through this splitter. 78MM PCB board was embedded conduction circuit to avoid damage to the conductor. Function：Can shield the external electromagnetic signal interference to prevent damage to the internet signal. Use:Allows a laptop to access Ethernet in different rooms, without having to pull the cable from other room to the room to connect to this computer.