Bests & Worsts Reviews from Amazon

I'm thinking the people rating this poorly don't understand how to use it. It WON'T split a single Ethernet CONNECTION into two. It WILL enable a single Ethernet CABLE (which has 8 wires) to carry two connections (which require 4 wires each). This is helpful in places where you have a single cable running from your router (typically in a wiring closet) to two devices, and can't easily run a second cable -- i.e., where one cable is already installed in the walls. Here's how you use it: Run Ethernet cables from 2 ports of your router into the female jacks of the first splitter. Plug the male end of that splitter into the jack in your wiring closet that runs to the part of your house you want. Plug the male end of the second splitter into the Ethernet jack at the other end of that cable run (i.e., in the room where the devices are located). Run Ethernet cables from the female jacks of the second splitter to the devices. If you want to use a single Ethernet connection for two devices, these splitters won't work; you need a router that shares the connection among the devices.