Check the listing for details. 2 Wire DSL Filter Single Line Wall Mount LFT 4-1 WM New!. Condition: New. Listed at 10.00 USD. This 2Wire DSL Filter is a must-have for any computer user in need of a reliable and high-quality internet connection. With its single line wall mount design, this filter is perfect for those who want to keep their cables organized and out of the way. The filter is compatible with the 4-1 WM model and features a DSL/Phone (RJ-11) connector for easy connection to your computer or networking devices. Whether you're browsing the web or streaming videos, this 2Wire DSL Filter is the perfect solution for a fast and reliable internet connection.