Type: RJ11 6P4C Male to Dual Female Socket. Case Size: 27mm/1.06' x 21mm/0.826' x 21mm/0.826'(Lx W x H);Cable Length: 125mm/4.9' RJ11 Male to dual Female 6P4C Splitter: Specially designed 2 way RJ11 6P4C splitter lets you plug in two phone devices to one wall jack. It allows two telephones or modems with US plug to connect to a single US telephone socket.with US plug to connect to a single US telephone socket. Easy to use: RJ11 Telephone Splitter is easy to use, you just plug the RJ11 male plug into the RJ11 phone socket, and plug your RJ11 cables into the splitter. Package Includes: 2 PCs Telephone Splitters.