The USB-EDID-PRO2 can be used to read the EDID from any VGA, DVI or HDMI monitor, or similar device. It can also program a new EDID back into the device (if target is write enabled and allows programming). Connect to the USB port of any PC and plug The DVI output port to your display's input. For VGA and HDMI displays adapters are included in the kit. Simply plug the appropriate adapter to the DVI output. Using free Hall Research Windows™ software, you will be able to read, save, and even modify the EDID of any display. You can also use it to program EDID into Hall Research VGA EDID Emulator (EM-EDID-HD15). No power supply is needed when connected to USB port of PC. Can be used as DVI buffer/extender and EDID Emulator.