Wantek RJ9 Phone Extension Cable, Telephone Handset Cord, Landline RJ9 Phone Line, Phone Cord RJ9 + Quick Connect Plug, Two Pieces 【High-Purity Oxygen-Free Copper Plated Core Material】 - Wantek phone lines use imported high-purity oxygen-free copper plated cores, making the phone line more durable, less prone to aging and distortion, lighter, and with faster transmission speeds. 【High Elasticity】 - Can stretch up to 3 meters, solving the shortcomings of short traditional phone lines, allowing you to move around while listening to the phone and extending your range of activity. 【Quick Connect Plug】 - The rear end of this Wantek phone line has a quick connect plug, which can be plugged into a telephone headset with a quick connect plug, enabling plug-and-play and freeing up your hands. 【One Telephone Headset Can Be Used with Multiple Phones】 - If you have multiple phones, plug the Wantek phone cable into all of them, and when any phone rings, just plug the telephone headset into that phone to answer. Management Number 9