"...transform the existing power lines in your home or small office into a high-speed network solution. Without running wires, PLC-185S takes advantage of your existing electrical wiring to create or extend a network environment. PLC-185S is also an ideal solution for homes or small offices where concrete walls, floors in multi-storied buildings, or other architectural barriers could inhibit a wireless signal.
Just plug the PLC-185S into an electrical outlet and it can turn every electrical outlet into a possible network connection to connect to any network devices, such as wireless router, network cameras, and video servers." or VoIP bugs :) (more)