Trendnets powerline 1200 av2 adapter kit model tpl 420e2k comes with two powerline adapters to create an extreme performance powerline network using an existing electrical system no cd installation required encrypted trendnet adapters auto connect out of the box plug in the first adapter and network it to your existing router plug in other adapters on the same electrical system and they auto connect to the first adapter for immediate internet access plug in install simply plug in