Unique bargains's RJ11 6P4C M/F two-way telephone jack splitter is a phone line extended adapter. (color: white) It can convert a single phone jack into one or two jacks. After conversion, you can plug in two different or same devices such as telephones, fax machines, modems, and answering machines. It's convenient and can be used in multiple ways with different devices. The cable length is 16cm or 6.3 inches. Its weight is 9 grams with the size of 2.6 x 2 x 2.2 cm/ 1'' x 0.8'' x 0.8''. However, it comes with a warning to not expose this adapter for a long time near your face as it has harmful chemicals.