The Powerline 200 AV Nano Adapter, model TPL-308E, uses an electrical outlet to create a secure high speed network. Two adapters are needed to start a network. Connect one adapter to your router and plug another adapter into an outlet on your electrical system for instant high speed network access. The compact form factor saves space around crowded electrical outlets. This adapter automatically connects to other TRENDnet Powerline AV adapters with no installation required -TRENDnet recommends pressing the 'Sync' button to automatically change default encryption keys.