This telephone adapter allows you to connect your vintage or rotary phone to a standard RJ-11 wall jack. With a beige color and 1:1 connection split/duplication, this adapter is perfect for those who want to keep the classic look of their phone while still being able to use it in modern times. The plug type is 4-prong and the connector A is RJ-11, making it easy to install and use. Great for those who want to add a retro touch to their home or office phone system.