gfortun beige 6p4c 4 pin rj11 dual female to rj11 4 pin male socket plug cord 2-way cable splitter adapter for landline telephone (2 pack) gfortun 1 male plug to 2 female dual socket, 6p4c rj11 plug. you can connect two modem or telephone cable to a phone devices. <br>the adapter is suitable for standard telephone cable, is easy to use.