The D-Link Phone DSL Line Filter RJ11 is a universal filter unit with a 1-year manufacturer warranty. It features a 1:1 connection split/duplication and is compatible with various RJ-11 connectors. The filter has a 10cm cable length and a white colour, making it easy to install and blend in with your existing setup. Made in China, this filter from D-Link is a reliable and efficient solution for filtering out unwanted noise and interference on your phone DSL line.