Manufacturer Part #: EXT-DVI-EDID

This unique device greatly simplifies the installation process for extending digital displays and projectors by storing your computer's digital video information (EDID).
Once installed and connected, the DVI Detective continually transmits the EDID to the computer essentially "tricking" the computer into thinking that the video is present, even when it is not connected. The user can then disconnect the display, place it in a remote location, and reconnect it without rebooting the operating system.
The entire installation process benefits from the DVI Detective, which utilizes a much smaller cable that requires fewer connections; it makes life easier for those extending digital displays or projectors.
What is EDID?
EDID - Extended Display Identification Data is a VESA standard data format that contains basic information about a monitor and its capabilities, including vendor information, maximum image size, color characteristics, factory preset timings, frequency range limits, and character strings for the monitor name and serial number.