✔️EXTRA DURABLE ADSL cable has fully molded strain relief and better shielding than most of other RJ11 extension cables. This RJ11 telephone extension cable molded connections improves durability and strength reducing the risk of cable and connector separation. ✔️GREAT EXTENDER - Replace your old, worn-out or damaged cord with a high-quality upgrade that features a durable jacket that protects against wear and tear.High-Quality phone line cord extension allows you to place your phone 25 ft away from the telephone wall jack ✔️UNIVERSAL COMPATIBILITY For home or office use with all brands of telephones, ADSL router, modems, fax machines, answering machines and other devices that connect to standard phone jacks. ✔️ENSURE GREAT CONNECTION - The cores of wires are made of pure-copper, 100% 26WAG, much better than ordinary Copper-Clad-Steel telephone cord; contacts of plugs are coated with thicker gold plate. Both ensure great connection and calls.