Two Way Telephone Splitter: Specially designed 2 way RJ11 6P4C splitter lets you plug in two phone devices to one wall jack. | Type : 4 Pin RJ11 Socket to 4 Pin RJ11 Plug. 6P4C RJ11 plug. | 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. | Two Way Telephone Splitter: Specially designed 2 way RJ11 6P4C splitter lets you plug in two phone devices to one wall jack. | RJ11 Phone Splitter helps to insert two devices such as telephone, fax, modem,answering machine into wall jack.Phone module adapters can also use fax machines as well as phone.