can be used stably at 4K@30Hz, and 1080@60Hz, and can serve as a virtual monitor when it is not used.Female head can be connected with external display.To achieve multi-frequency signal lock.Install EDID lock screen and remain the splicing state. This device solved the EDID problem With this device installed in-line. Windows no longer keeps searching for the monitor type when switched on a KVM(The true fix delete Windows and install Linux). DVI KVM that did not have EDID plugged into the motherboard ,Solved an problem of when monitor would sleep, all the apps would move to a different screen. connected directly to the DVI output of the video card or to the Displayport-to-DVI converter for the second display output, turn off the monitor without having desktop rearranged.