The kit includes a single port adapter (the PLE300), which is connected to a router or the hub of an existing network. The other four port adapter included in the kit (the PLS300) plugs into an ordinary power outlet and can connect to up to four Ethernet-equipped devices (such as computers, TiVos, or digital media adapters) which then become part of the LAN network and can share HD videos, photos, documents, networked games, printers, and internet. By converting the existing powerlines of a house into high-speed connections, Linksys offers an alternative to the costly installation of a brand new network of Ethernet lines. If necessary, additional adapters (PLE300) can be purchased separately to add more devices to the network. The Linksys PLK300 includes a CD-ROM with instructions for setup, a 1 year limited warranty and free technical support.