The Revolabs PoE (Power over Ethernet) Injector kit allows to use the Revolabs FLX VoIP behind Ethernet outlets that are not PoE enabled. To add the power to the Ethernet connection, plug the PoE adapter into your Ethernet wall outlet, or your Ethernet hub or Ethernet switch outlet on which you want to use the Revolabs FLX. Connect the power connector of the PoE Injector with the power supply, and plug the power supply into a power outlet.