The DSL filter for phone line is made of high-quality plastic material, with high hardness, durable and safe. The plugs of phone line filters are made of pure-copper, which ensures stable signal transmission and clear communication. | Reduce digital noise and unwanted interference caused by DSL. You will get 3 pack Beige DSL Filter (ADSL Filter). | ADSL Splitter is well suited for Home Network. ADSL splitters take a role of separating low-frequency audio signals from high-frequency signals. They can decrease noise levels and improves signal quality. | Apply with DIRECTV, Satellite Dish, Comcast, TIVO (DVR), Telephone, Fax, Answering Machine, Printers, Modems, Computers and more. | ADSL splitter is just a regular phone splitter with a filter on one of the outputs. They allow the internet to work on your PC through the telephone line (connected to the modem of course).