Stable Connection: The DSL filter for landline phones is designed to split the incoming signal into separate outputs, reducing digital noise and unwanted interference caused by DSL, ensuring a stable, interference-free connection. With the DSL filter, you can enjoy a smoother browsing and communication experience without disruptions | Clear Sound: The DSL Modem Phone Filter is made from high-quality ABS material for durability and safety. Its pure copper plugs provide stable signal transmission and clear communication. By eliminating DSL interference, the filter prevents voice dropouts, hissing, static, and other background noises, ensuring a smooth, uninterrupted phone call experience | Universally Compatible: The RJ11 6P2C in-line DSL Filter is compatible with all landline phones, cordless phones, fax machines, answering machines, and even on VoIP phones. It supports a clutter-free, high-performance setup across all devices | Easy Installation: Simply connect your phone device to RJ11 female and the RJ11 male end into your wall phone jack-no tools, batteries, or additional wires needed. Plug and play | Package & Service: 2 x DSL filter. If you have any questions or need assistance, please feel free to contact us