Description 1. Made of high-quality materials, durable and easy to use 2. Very suitable for all phone models that often turn off the headset, and can be used with all directly connected headset models. 3. Easy to install and easy to use 4. Telephone extension cord 5. It is no longer necessary to insert the headset under or on the back of the office phone. Product name: RJ9 4P4C male to female adapter cable Interface: RJ9 male to RJ9 female Colour:black Material:ABS Size:25cm Package Contents: 1 x RJ9 4P4C male to female adapter cable Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.