Trendnets powerline 1200 av2 adaptertpl 420e creates an extreme performance powerline 1200 network using an existing electrical system two adapters are needed to start a network this is a single unit designed for expanding an existing homeplug network no cd installation required encrypted trendnet adapters auto connect out of the box trendnets powerline 1200 av2 adapter model tpl 420e creates an extreme performance powerline 1200 network using an existing electrical system