Requires two Nano Powerline Adapter for usage This package includes only one adapter. Need to purchase the starter kit to receive two adapters 300-meter range over electrical circuitry for better performance through walls and floors Miniature design with compact housing (28.5mm thick) blends into existing room décor Plug and Play, with no drilling, wiring, or configuration required Automatic Power-Saving mode reduces power consumption by up to 85% 128-bit AES encryption for network security and data protection TP-LINK USA AV500 PowerLine Satisfaction Guarantee. TP-LINK USA has implemented a special program for all of its AV500 PowerLine adapters. Under this program a customer can return their TP-LINK AV500 PowerLine adapter for any reason regardless of when or where it was purchased directly to TP-LINK USA. For more information about this program, including how to return your product, please call TP-LINK USA’s support hotline at 1-866-225-8139