This is an RJ11 6P4C modular phone line connector to RJ11 6P4C jack connector adapter for connecting a phone line or a single jack in a phone jack for accurate signaling and clear sound quality. The extension cord is suitable for analog phones, faxes and modems.Features:1. The telephone line splitter expands one RJ11 6P4C male receptacle into two RJ11 6P4C female receptacles.2. Not only can you use a telephone, but you can also use a fax machine with VOIP telephone equipment.3. Fits standard RJ11 6P4C interfaces and is suitable for most phone lines and devices.External Material: Plastic, MetalType: RJ11 6P4C Socket to PJ11 6P4C ConnectorCable Length: 14cm / 5.5"Color: WhitePackage Content: 1 x RJ11 Extension Cable Connector.