The ADSL Micro Filter Phone Line Modem Router Adapter X 4 is a set of white filter phone line modem router adapters designed for use with DSL/Phone (RJ-11) connections. Each adapter has an RJ-11 connector on one end and a DSL/Phone (RJ-11) female connector on the other, making it ideal for connecting modems and routers. With a cable length of 10 cm, these adapters are compact and easy to use, providing a reliable solution for filtering and connecting phone lines in a home or office networking setup. They are in good condition with 2 never used.