Terk TECHNOLOGY LF10S HomeNetwork Remote Video System (Discontinued by Manufacturer) Terk's HomeNetwork system transmits video source (such as DSS, DVD, VCR) to a television in any other room of the house by using your existing telephone lines with 2-way interactivity so that user at remote location can remotely control the source It requires the initial purchase of the Terk LF10S which consists of transmitter module (connects to video source) and one receiver (connects to remote TV) The LF10R is an additional receiver It has an effective operating range of over 500 feet and is NTSC compatible Obviously, the area of the source and the areas of the remotes should have access to a standard RJ11 phone jack