Reference:
2A-130G
"The 2A-130G VGA EDID Emulator is designed for ATEN™ KVM extender or video extender installations that do not utilize a local monitor at the site where the computer/video source is located. The 2A-130G emulates and stores a default ATEN EDID (Extended Display Identification Information) setting in a non-volatile memory. This means the computer/video source can still ""see"" the display, even though it is not directly connected. Superior video quality - up to 1920 x 1200@60Hz, 1366 x 768@60Hz. USB Powered - No need for an external power adapter."