The Linksys Powerline Homeplug AV Kit PLEK400 is a set of two black powerline adapters that allow you to create a home network using powerline connections. With the model number PLEK400, this extender from Linksys provides a reliable and secure way to expand your home network without the need for additional wiring. Perfect for connecting multiple devices in hard-to-reach areas, this open box kit offers a simple solution for improving your home networking setup.