This product turns ordinary electrical sockets into telephone outlets. It uses DECT technology which means it is digital, works faster and quieter, and is an all round higher specification than the old version. It is suitable for use with a PC, set top box, telephone or fax machine. No extra wiring is required and it is completely portable. Compatible with PC modems. Simply plug in the base unit near to the master telephone socket, a through connector allows connection to the master socket without interrupting the existing phone. The extension unit can then be plugged in anywhere in any room where a mains socket is located to give you an additional telephone socket without having unsightly cables trailing around the house. This product can even be used in your garage, or garden shed if you have mains to the them!