This duplex extension enables connection of two telephones or accessories. It easily extends the reach from outlet to your devices. Designed for superior signal transmission & maximum compatibility. Cable Type: Duplex Outlet Line Extension Cord; Connector / Port / Interface: 6P4C Plug; Dual Jack; for Device Type: Telephones; Telephone Accessories; Connects Devices (From / To): Telephone to Modular Phone Wall Outlet.